| 
                 
                    Closing price on 11/28/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    131.00 | 
                 
                
                    | High | 
                    131.80 | 
                 
                
                    | Low | 
                    130.00 | 
                     
                
                    | Volume | 
                    66,250 | 
                                 
                
                    | Split-adjusted Price | 
                    40.45 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                11/13/2017
             | 
            
                +1.50 / +1.17%
             |             
            
                128.00
             |           
            
                129.50
             |               
            
                126.10
             |                           
            
                129.50
             | 
            
                128.49
             |                     
            
                40.11
             |                                 
            
                64,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/10/2017
             | 
            
                +2.70 / +2.15%
             |             
            
                125.30
             |           
            
                129.40
             |               
            
                125.30
             |                           
            
                128.00
             | 
            
                127.72
             |                     
            
                39.65
             |                                 
            
                83,020
             |            
            
                 
             |                                       
         
    
        
            | 
                11/9/2017
             | 
            
                -2.40 / -1.88%
             |             
            
                127.50
             |           
            
                128.00
             |               
            
                124.50
             |                           
            
                125.30
             | 
            
                125.97
             |                     
            
                38.81
             |                                 
            
                93,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/8/2017
             | 
            
                -0.30 / -0.23%
             |             
            
                128.00
             |           
            
                129.40
             |               
            
                127.70
             |                           
            
                127.70
             | 
            
                128.01
             |                     
            
                39.55
             |                                 
            
                54,800
             |            
            
                 
             |                                       
         
    
        
            | 
                11/7/2017
             | 
            
                -1.40 / -1.08%
             |             
            
                129.60
             |           
            
                129.60
             |               
            
                127.90
             |                           
            
                128.00
             | 
            
                128.38
             |                     
            
                39.65
             |                                 
            
                81,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/6/2017
             | 
            
                +4.40 / +3.52%
             |             
            
                125.00
             |           
            
                129.40
             |               
            
                125.00
             |                           
            
                129.40
             | 
            
                127.55
             |                     
            
                40.08
             |                                 
            
                126,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/3/2017
             | 
            
                +2.40 / +1.96%
             |             
            
                122.00
             |           
            
                125.00
             |               
            
                122.00
             |                           
            
                125.00
             | 
            
                123.62
             |                     
            
                38.72
             |                                 
            
                75,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/2/2017
             | 
            
                -2.90 / -2.31%
             |             
            
                125.50
             |           
            
                125.50
             |               
            
                122.60
             |                           
            
                122.60
             | 
            
                123.87
             |                     
            
                37.97
             |                                 
            
                121,570
             |            
            
                 
             |                                       
         
    
        
            | 
                11/1/2017
             | 
            
                +3.20 / +2.62%
             |             
            
                123.00
             |           
            
                125.50
             |               
            
                123.00
             |                           
            
                125.50
             | 
            
                124.50
             |                     
            
                38.87
             |                                 
            
                75,360
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/31/2017
             | 
            
                -3.10 / -2.47%
             |             
            
                126.00
             |           
            
                126.00
             |               
            
                122.30
             |                           
            
                122.30
             | 
            
                124.09
             |                     
            
                37.88
             |                                 
            
                119,830
             |            
            
                 
             |                                       
         
    
        
            | 
                10/30/2017
             | 
            
                +4.00 / +3.29%
             |             
            
                122.90
             |           
            
                126.80
             |               
            
                122.00
             |                           
            
                125.40
             | 
            
                124.90
             |                     
            
                38.84
             |                                 
            
                133,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/27/2017
             | 
            
                -1.50 / -1.22%
             |             
            
                121.50
             |           
            
                123.00
             |               
            
                120.70
             |                           
            
                121.40
             | 
            
                121.50
             |                     
            
                37.60
             |                                 
            
                78,880
             |            
            
                 
             |                                       
         
    
        
            | 
                10/26/2017
             | 
            
                -2.10 / -1.68%
             |             
            
                124.60
             |           
            
                126.30
             |               
            
                119.50
             |                           
            
                122.90
             | 
            
                122.20
             |                     
            
                38.07
             |                                 
            
                256,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/25/2017
             | 
            
                -3.00 / -2.34%
             |             
            
                128.00
             |           
            
                129.00
             |               
            
                124.00
             |                           
            
                125.00
             | 
            
                125.84
             |                     
            
                38.72
             |                                 
            
                190,010
             |            
            
                 
             |                                       
         
    
        
            | 
                10/24/2017
             | 
            
                +0.10 / +0.08%
             |             
            
                127.90
             |           
            
                129.20
             |               
            
                126.00
             |                           
            
                128.00
             | 
            
                127.29
             |                     
            
                39.65
             |                                 
            
                83,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/23/2017
             | 
            
                -6.00 / -4.48%
             |             
            
                133.90
             |           
            
                133.90
             |               
            
                126.90
             |                           
            
                127.90
             | 
            
                129.39
             |                     
            
                39.62
             |                                 
            
                381,960
             |            
            
                 
             |                                       
         
    
        
            | 
                10/20/2017
             | 
            
                +0.90 / +0.68%
             |             
            
                132.00
             |           
            
                134.40
             |               
            
                131.90
             |                           
            
                133.90
             | 
            
                133.03
             |                     
            
                41.47
             |                                 
            
                96,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/19/2017
             | 
            
                -2.00 / -1.48%
             |             
            
                136.50
             |           
            
                136.80
             |               
            
                132.00
             |                           
            
                133.00
             | 
            
                133.96
             |                     
            
                41.20
             |                                 
            
                310,780
             |            
            
                 
             |                                       
         
    
        
            | 
                10/18/2017
             | 
            
                -2.60 / -1.89%
             |             
            
                138.90
             |           
            
                138.90
             |               
            
                135.00
             |                           
            
                135.00
             | 
            
                135.72
             |                     
            
                41.82
             |                                 
            
                172,710
             |  
            
                 
             |                                                              
             
    
         
    
    
 |