| 
                 
                    Closing price on 12/25/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    132.00 | 
                 
                
                    | High | 
                    133.40 | 
                 
                
                    | Low | 
                    131.60 | 
                     
                
                    | Volume | 
                    39,810 | 
                                 
                
                    | Split-adjusted Price | 
                    40.82 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                12/25/2017
             | 
            
                +0.20 / +0.15%
             |             
            
                132.00
             |           
            
                133.40
             |               
            
                131.60
             |                           
            
                131.80
             | 
            
                132.05
             |                     
            
                40.82
             |                                 
            
                39,810
             |            
            
                 
             |                                       
         
    
        
            | 
                12/22/2017
             | 
            
                -1.60 / -1.20%
             |             
            
                132.10
             |           
            
                133.80
             |               
            
                131.60
             |                           
            
                131.60
             | 
            
                132.23
             |                     
            
                40.76
             |                                 
            
                36,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/21/2017
             | 
            
                +1.20 / +0.91%
             |             
            
                131.00
             |           
            
                135.00
             |               
            
                131.00
             |                           
            
                133.20
             | 
            
                132.81
             |                     
            
                41.26
             |                                 
            
                54,220
             |            
            
                 
             |                                       
         
    
        
            | 
                12/20/2017
             | 
            
                +0.10 / +0.08%
             |             
            
                134.50
             |           
            
                134.50
             |               
            
                131.80
             |                           
            
                132.00
             | 
            
                132.17
             |                     
            
                40.89
             |                                 
            
                25,610
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/19/2017
             | 
            
                -2.10 / -1.57%
             |             
            
                134.90
             |           
            
                134.90
             |               
            
                128.00
             |                           
            
                131.90
             | 
            
                132.30
             |                     
            
                40.85
             |                                 
            
                28,580
             |            
            
                 
             |                                       
         
    
        
            | 
                12/18/2017
             | 
            
                -0.50 / -0.37%
             |             
            
                136.00
             |           
            
                136.00
             |               
            
                133.10
             |                           
            
                134.00
             | 
            
                134.30
             |                     
            
                41.51
             |                                 
            
                32,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/15/2017
             | 
            
                +3.60 / +2.75%
             |             
            
                130.90
             |           
            
                135.40
             |               
            
                130.00
             |                           
            
                134.50
             | 
            
                133.31
             |                     
            
                41.66
             |                                 
            
                76,910
             |            
            
                 
             |                                       
         
    
        
            | 
                12/14/2017
             | 
            
                +1.90 / +1.47%
             |             
            
                130.40
             |           
            
                130.90
             |               
            
                129.30
             |                           
            
                130.90
             | 
            
                130.30
             |                     
            
                40.55
             |                                 
            
                16,240
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/13/2017
             | 
            
                0.00 / 0.00%
             |             
            
                129.00
             |           
            
                129.90
             |               
            
                129.00
             |                           
            
                129.00
             | 
            
                129.15
             |                     
            
                39.96
             |                                 
            
                55,740
             |            
            
                 
             |                                       
         
    
        
            | 
                12/12/2017
             | 
            
                -1.50 / -1.15%
             |             
            
                130.00
             |           
            
                130.90
             |               
            
                126.50
             |                           
            
                129.00
             | 
            
                128.71
             |                     
            
                39.96
             |                                 
            
                122,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/11/2017
             | 
            
                -2.00 / -1.51%
             |             
            
                132.90
             |           
            
                132.90
             |               
            
                130.50
             |                           
            
                130.50
             | 
            
                131.24
             |                     
            
                40.42
             |                                 
            
                107,210
             |            
            
                 
             |                                       
         
    
        
            | 
                12/8/2017
             | 
            
                -0.50 / -0.38%
             |             
            
                132.00
             |           
            
                133.00
             |               
            
                132.00
             |                           
            
                132.50
             | 
            
                132.48
             |                     
            
                41.04
             |                                 
            
                126,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/7/2017
             | 
            
                -1.50 / -1.12%
             |             
            
                134.00
             |           
            
                134.60
             |               
            
                132.70
             |                           
            
                133.00
             | 
            
                133.35
             |                     
            
                41.20
             |                                 
            
                68,310
             |            
            
                 
             |                                       
         
    
        
            | 
                12/6/2017
             | 
            
                0.00 / 0.00%
             |             
            
                135.50
             |           
            
                135.50
             |               
            
                133.00
             |                           
            
                134.50
             | 
            
                133.90
             |                     
            
                41.66
             |                                 
            
                48,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/5/2017
             | 
            
                -1.00 / -0.74%
             |             
            
                136.50
             |           
            
                136.50
             |               
            
                134.50
             |                           
            
                134.50
             | 
            
                135.70
             |                     
            
                41.66
             |                                 
            
                135,260
             |            
            
                 
             |                                       
         
    
        
            | 
                12/4/2017
             | 
            
                +3.50 / +2.65%
             |             
            
                133.00
             |           
            
                136.50
             |               
            
                132.50
             |                           
            
                135.50
             | 
            
                134.49
             |                     
            
                41.97
             |                                 
            
                236,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/1/2017
             | 
            
                +1.00 / +0.76%
             |             
            
                131.50
             |           
            
                132.00
             |               
            
                130.50
             |                           
            
                132.00
             | 
            
                131.33
             |                     
            
                40.89
             |                                 
            
                84,190
             |            
            
                 
             |                                       
         
    
        
            | 
                11/30/2017
             | 
            
                -0.30 / -0.23%
             |             
            
                132.00
             |           
            
                133.00
             |               
            
                131.00
             |                           
            
                131.00
             | 
            
                131.56
             |                     
            
                40.58
             |                                 
            
                50,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/29/2017
             | 
            
                +0.70 / +0.54%
             |             
            
                131.00
             |           
            
                132.00
             |               
            
                131.00
             |                           
            
                131.30
             | 
            
                131.62
             |                     
            
                40.67
             |                                 
            
                59,640
             |            
            
                 
             |                                       
         
    
        
            | 
                11/28/2017
             | 
            
                -0.40 / -0.31%
             |             
            
                131.00
             |           
            
                131.80
             |               
            
                130.00
             |                           
            
                130.60
             | 
            
                130.69
             |                     
            
                40.45
             |                                 
            
                66,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/27/2017
             | 
            
                -1.30 / -0.98%
             |             
            
                132.30
             |           
            
                132.30
             |               
            
                131.00
             |                           
            
                131.00
             | 
            
                131.33
             |                     
            
                40.58
             |                                 
            
                65,470
             |            
            
                 
             |                                       
         
    
        
            | 
                11/24/2017
             | 
            
                +0.30 / +0.23%
             |             
            
                130.10
             |           
            
                132.30
             |               
            
                130.10
             |                           
            
                132.30
             | 
            
                131.22
             |                     
            
                40.98
             |                                 
            
                34,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/23/2017
             | 
            
                0.00 / 0.00%
             |             
            
                132.90
             |           
            
                132.90
             |               
            
                131.00
             |                           
            
                132.00
             | 
            
                131.98
             |                     
            
                40.89
             |                                 
            
                64,180
             |            
            
                 
             |                                       
         
    
        
            | 
                11/22/2017
             | 
            
                +1.50 / +1.15%
             |             
            
                129.50
             |           
            
                132.00
             |               
            
                129.50
             |                           
            
                132.00
             | 
            
                130.90
             |                     
            
                40.89
             |                                 
            
                72,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/21/2017
             | 
            
                -2.40 / -1.81%
             |             
            
                136.00
             |           
            
                136.00
             |               
            
                130.50
             |                           
            
                130.50
             | 
            
                131.75
             |                     
            
                40.42
             |                                 
            
                94,520
             |            
            
                 
             |                                       
         
    
        
            | 
                11/20/2017
             | 
            
                +1.30 / +0.99%
             |             
            
                132.00
             |           
            
                133.00
             |               
            
                128.00
             |                           
            
                132.90
             | 
            
                131.86
             |                     
            
                41.16
             |                                 
            
                114,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/17/2017
             | 
            
                +0.10 / +0.08%
             |             
            
                131.90
             |           
            
                131.90
             |               
            
                129.60
             |                           
            
                131.60
             | 
            
                130.42
             |                     
            
                40.76
             |                                 
            
                70,030
             |            
            
                 
             |                                       
         
    
        
            | 
                11/16/2017
             | 
            
                -0.50 / -0.38%
             |             
            
                131.00
             |           
            
                131.90
             |               
            
                130.10
             |                           
            
                131.50
             | 
            
                131.10
             |                     
            
                40.73
             |                                 
            
                97,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/15/2017
             | 
            
                0.00 / 0.00%
             |             
            
                132.50
             |           
            
                133.50
             |               
            
                131.70
             |                           
            
                132.00
             | 
            
                132.52
             |                     
            
                40.89
             |                                 
            
                34,630
             |            
            
                 
             |                                       
         
    
        
            | 
                11/14/2017
             | 
            
                +2.50 / +1.93%
             |             
            
                130.00
             |           
            
                132.50
             |               
            
                130.00
             |                           
            
                132.00
             | 
            
                131.48
             |                     
            
                40.89
             |                                 
            
                89,530
             |  
            
                 
             |                                                              
             
    
         
    
    
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