| 
                 
                    Closing price on 3/28/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    132.00 | 
                 
                
                    | High | 
                    132.60 | 
                 
                
                    | Low | 
                    131.00 | 
                     
                
                    | Volume | 
                    29,610 | 
                                 
                
                    | Split-adjusted Price | 
                    33.77 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/28/2017
             | 
            
                -0.20 / -0.15%
             |             
            
                132.00
             |           
            
                132.60
             |               
            
                131.00
             |                           
            
                131.80
             | 
            
                131.41
             |                     
            
                33.77
             |                                 
            
                29,610
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2017
             | 
            
                +1.70 / +1.30%
             |             
            
                131.40
             |           
            
                134.60
             |               
            
                131.20
             |                           
            
                132.00
             | 
            
                132.02
             |                     
            
                33.82
             |                                 
            
                34,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2017
             | 
            
                +1.00 / +0.77%
             |             
            
                130.00
             |           
            
                131.70
             |               
            
                129.00
             |                           
            
                130.30
             | 
            
                130.24
             |                     
            
                33.38
             |                                 
            
                36,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2017
             | 
            
                -3.90 / -2.93%
             |             
            
                133.20
             |           
            
                133.20
             |               
            
                129.00
             |                           
            
                129.30
             | 
            
                130.53
             |                     
            
                33.13
             |                                 
            
                153,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2017
             | 
            
                -1.40 / -1.04%
             |             
            
                134.10
             |           
            
                134.90
             |               
            
                133.00
             |                           
            
                133.20
             | 
            
                133.94
             |                     
            
                34.13
             |                                 
            
                67,620
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2017
             | 
            
                +0.20 / +0.15%
             |             
            
                134.20
             |           
            
                138.00
             |               
            
                134.00
             |                           
            
                134.60
             | 
            
                135.25
             |                     
            
                34.49
             |                                 
            
                47,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2017
             | 
            
                -6.80 / -4.82%
             |             
            
                131.40
             |           
            
                138.00
             |               
            
                131.40
             |                           
            
                134.40
             | 
            
                134.19
             |                     
            
                34.43
             |                                 
            
                370,120
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2017
             | 
            
                -1.30 / -0.91%
             |             
            
                142.00
             |           
            
                142.30
             |               
            
                140.90
             |                           
            
                141.20
             | 
            
                141.22
             |                     
            
                36.18
             |                                 
            
                69,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2017
             | 
            
                0.00 / 0.00%
             |             
            
                142.50
             |           
            
                143.40
             |               
            
                141.60
             |                           
            
                142.50
             | 
            
                142.16
             |                     
            
                36.51
             |                                 
            
                23,030
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2017
             | 
            
                0.00 / 0.00%
             |             
            
                143.00
             |           
            
                143.50
             |               
            
                141.00
             |                           
            
                142.50
             | 
            
                142.05
             |                     
            
                36.51
             |                                 
            
                72,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2017
             | 
            
                +4.50 / +3.26%
             |             
            
                138.00
             |           
            
                142.50
             |               
            
                137.80
             |                           
            
                142.50
             | 
            
                140.41
             |                     
            
                36.51
             |                                 
            
                211,040
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2017
             | 
            
                -0.50 / -0.36%
             |             
            
                138.50
             |           
            
                138.70
             |               
            
                137.50
             |                           
            
                138.00
             | 
            
                138.30
             |                     
            
                35.36
             |                                 
            
                33,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2017
             | 
            
                -0.50 / -0.36%
             |             
            
                139.50
             |           
            
                139.50
             |               
            
                138.50
             |                           
            
                138.50
             | 
            
                138.95
             |                     
            
                35.48
             |                                 
            
                35,280
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2017
             | 
            
                0.00 / 0.00%
             |             
            
                138.10
             |           
            
                139.00
             |               
            
                138.10
             |                           
            
                139.00
             | 
            
                138.24
             |                     
            
                35.61
             |                                 
            
                8,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2017
             | 
            
                +2.00 / +1.46%
             |             
            
                137.00
             |           
            
                139.80
             |               
            
                136.60
             |                           
            
                139.00
             | 
            
                139.11
             |                     
            
                35.61
             |                                 
            
                52,110
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2017
             | 
            
                -1.00 / -0.72%
             |             
            
                138.00
             |           
            
                138.00
             |               
            
                136.50
             |                           
            
                137.00
             | 
            
                137.17
             |                     
            
                35.10
             |                                 
            
                133,391
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2017
             | 
            
                -0.70 / -0.50%
             |             
            
                138.00
             |           
            
                138.80
             |               
            
                138.00
             |                           
            
                138.00
             | 
            
                138.31
             |                     
            
                35.36
             |                                 
            
                27,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/3/2017
             | 
            
                +0.20 / +0.14%
             |             
            
                138.60
             |           
            
                139.00
             |               
            
                136.10
             |                           
            
                138.70
             | 
            
                137.80
             |                     
            
                35.54
             |                                 
            
                9,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2017
             | 
            
                +0.10 / +0.07%
             |             
            
                139.00
             |           
            
                139.20
             |               
            
                138.00
             |                           
            
                138.50
             | 
            
                138.80
             |                     
            
                35.48
             |                                 
            
                33,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2017
             | 
            
                +0.90 / +0.65%
             |             
            
                137.50
             |           
            
                139.80
             |               
            
                136.90
             |                           
            
                138.40
             | 
            
                138.15
             |                     
            
                35.46
             |                                 
            
                46,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2017
             | 
            
                +2.50 / +1.85%
             |             
            
                134.00
             |           
            
                140.00
             |               
            
                134.00
             |                           
            
                137.50
             | 
            
                137.65
             |                     
            
                35.23
             |                                 
            
                69,690
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2017
             | 
            
                +4.00 / +3.05%
             |             
            
                131.00
             |           
            
                135.00
             |               
            
                131.00
             |                           
            
                135.00
             | 
            
                132.59
             |                     
            
                34.59
             |                                 
            
                33,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/24/2017
             | 
            
                -2.80 / -2.09%
             |             
            
                131.50
             |           
            
                135.50
             |               
            
                131.00
             |                           
            
                131.00
             | 
            
                132.50
             |                     
            
                33.56
             |                                 
            
                93,950
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2017
             | 
            
                -6.50 / -4.63%
             |             
            
                140.00
             |           
            
                140.10
             |               
            
                131.00
             |                           
            
                133.80
             | 
            
                135.68
             |                     
            
                34.28
             |                                 
            
                140,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2017
             | 
            
                +0.80 / +0.57%
             |             
            
                139.50
             |           
            
                141.20
             |               
            
                139.40
             |                           
            
                140.30
             | 
            
                139.95
             |                     
            
                35.95
             |                                 
            
                53,720
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2017
             | 
            
                0.00 / 0.00%
             |             
            
                140.90
             |           
            
                141.50
             |               
            
                139.00
             |                           
            
                139.50
             | 
            
                140.00
             |                     
            
                35.74
             |                                 
            
                99,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2017
             | 
            
                -0.50 / -0.36%
             |             
            
                140.50
             |           
            
                141.90
             |               
            
                139.50
             |                           
            
                139.50
             | 
            
                140.83
             |                     
            
                35.74
             |                                 
            
                43,620
             |            
            
                 
             |                                       
         
    
        
            | 
                2/17/2017
             | 
            
                +4.90 / +3.63%
             |             
            
                135.00
             |           
            
                140.00
             |               
            
                134.50
             |                           
            
                140.00
             | 
            
                136.24
             |                     
            
                35.87
             |                                 
            
                175,524
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/16/2017
             | 
            
                -0.20 / -0.15%
             |             
            
                135.10
             |           
            
                136.00
             |               
            
                134.00
             |                           
            
                135.10
             | 
            
                135.07
             |                     
            
                34.61
             |                                 
            
                96,690
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2017
             | 
            
                +0.70 / +0.52%
             |             
            
                135.00
             |           
            
                136.00
             |               
            
                134.60
             |                           
            
                135.30
             | 
            
                135.40
             |                     
            
                34.66
             |                                 
            
                74,740
             |  
            
                 
             |                                                              
             
    
         
    
    
 |