| 
                 
                    Closing price on 9/25/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    142.00 | 
                 
                
                    | High | 
                    142.90 | 
                 
                
                    | Low | 
                    141.50 | 
                     
                
                    | Volume | 
                    160,550 | 
                                 
                
                    | Split-adjusted Price | 
                    43.98 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/25/2017
             | 
            
                0.00 / 0.00%
             |             
            
                142.00
             |           
            
                142.90
             |               
            
                141.50
             |                           
            
                142.00
             | 
            
                142.22
             |                     
            
                43.98
             |                                 
            
                160,550
             |            
            
                 
             |                                       
         
    
        
            | 
                9/22/2017
             | 
            
                -2.80 / -1.93%
             |             
            
                144.30
             |           
            
                147.00
             |               
            
                142.00
             |                           
            
                142.00
             | 
            
                144.51
             |                     
            
                43.98
             |                                 
            
                344,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/21/2017
             | 
            
                +1.90 / +1.33%
             |             
            
                142.90
             |           
            
                145.00
             |               
            
                142.90
             |                           
            
                144.80
             | 
            
                143.89
             |                     
            
                44.85
             |                                 
            
                144,460
             |            
            
                 
             |                                       
         
    
        
            | 
                9/20/2017
             | 
            
                +0.40 / +0.28%
             |             
            
                141.10
             |           
            
                143.00
             |               
            
                141.00
             |                           
            
                142.90
             | 
            
                142.56
             |                     
            
                44.26
             |                                 
            
                128,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/19/2017
             | 
            
                0.00 / 0.00%
             |             
            
                142.50
             |           
            
                143.70
             |               
            
                142.50
             |                           
            
                142.50
             | 
            
                143.01
             |                     
            
                44.14
             |                                 
            
                122,340
             |            
            
                 
             |                                       
         
    
        
            | 
                9/18/2017
             | 
            
                +3.10 / +2.22%
             |             
            
                139.00
             |           
            
                142.50
             |               
            
                139.00
             |                           
            
                142.50
             | 
            
                141.29
             |                     
            
                44.14
             |                                 
            
                227,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/15/2017
             | 
            
                +1.40 / +1.01%
             |             
            
                138.50
             |           
            
                139.50
             |               
            
                137.00
             |                           
            
                139.40
             | 
            
                138.16
             |                     
            
                43.18
             |                                 
            
                70,580
             |            
            
                 
             |                                       
         
    
        
            | 
                9/14/2017
             | 
            
                -2.00 / -1.43%
             |             
            
                140.50
             |           
            
                140.50
             |               
            
                138.00
             |                           
            
                138.00
             | 
            
                138.85
             |                     
            
                42.74
             |                                 
            
                85,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/13/2017
             | 
            
                +2.60 / +1.89%
             |             
            
                138.50
             |           
            
                141.00
             |               
            
                138.50
             |                           
            
                140.00
             | 
            
                139.80
             |                     
            
                43.36
             |                                 
            
                308,090
             |            
            
                 
             |                                       
         
    
        
            | 
                9/12/2017
             | 
            
                +1.90 / +1.40%
             |             
            
                134.20
             |           
            
                137.50
             |               
            
                134.20
             |                           
            
                137.40
             | 
            
                136.59
             |                     
            
                42.56
             |                                 
            
                165,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/11/2017
             | 
            
                +2.00 / +1.50%
             |             
            
                133.50
             |           
            
                137.90
             |               
            
                132.00
             |                           
            
                135.50
             | 
            
                134.51
             |                     
            
                41.97
             |                                 
            
                174,080
             |            
            
                 
             |                                       
         
    
        
            | 
                9/8/2017
             | 
            
                -0.50 / -0.37%
             |             
            
                134.90
             |           
            
                135.00
             |               
            
                133.50
             |                           
            
                133.50
             | 
            
                134.33
             |                     
            
                41.35
             |                                 
            
                79,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/7/2017
             | 
            
                +3.00 / +2.29%
             |             
            
                130.50
             |           
            
                135.00
             |               
            
                130.50
             |                           
            
                134.00
             | 
            
                133.41
             |                     
            
                41.51
             |                                 
            
                162,140
             |            
            
                 
             |                                       
         
    
        
            | 
                9/6/2017
             | 
            
                +2.10 / +1.63%
             |             
            
                128.00
             |           
            
                132.00
             |               
            
                128.00
             |                           
            
                131.00
             | 
            
                129.94
             |                     
            
                40.58
             |                                 
            
                89,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/5/2017
             | 
            
                -1.10 / -0.85%
             |             
            
                128.50
             |           
            
                129.90
             |               
            
                128.50
             |                           
            
                128.90
             | 
            
                129.09
             |                     
            
                39.93
             |                                 
            
                42,620
             |            
            
                 
             |                                       
         
    
        
            | 
                9/1/2017
             | 
            
                +0.20 / +0.15%
             |             
            
                129.00
             |           
            
                130.50
             |               
            
                128.20
             |                           
            
                130.00
             | 
            
                129.74
             |                     
            
                40.27
             |                                 
            
                35,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/31/2017
             | 
            
                -0.90 / -0.69%
             |             
            
                130.70
             |           
            
                131.00
             |               
            
                128.00
             |                           
            
                129.80
             | 
            
                129.84
             |                     
            
                40.20
             |                                 
            
                90,850
             |            
            
                 
             |                                       
         
    
        
            | 
                8/30/2017
             | 
            
                +1.60 / +1.24%
             |             
            
                129.60
             |           
            
                130.70
             |               
            
                128.00
             |                           
            
                130.70
             | 
            
                129.55
             |                     
            
                40.48
             |                                 
            
                58,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/29/2017
             | 
            
                +1.90 / +1.49%
             |             
            
                127.20
             |           
            
                130.00
             |               
            
                127.00
             |                           
            
                129.10
             | 
            
                128.65
             |                     
            
                39.99
             |                                 
            
                70,470
             |            
            
                 
             |                                       
         
    
        
            | 
                8/28/2017
             | 
            
                +0.20 / +0.16%
             |             
            
                127.00
             |           
            
                130.00
             |               
            
                126.80
             |                           
            
                127.20
             | 
            
                127.35
             |                     
            
                39.40
             |                                 
            
                92,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/25/2017
             | 
            
                -2.80 / -2.16%
             |             
            
                130.90
             |           
            
                130.90
             |               
            
                127.00
             |                           
            
                127.00
             | 
            
                127.76
             |                     
            
                39.34
             |                                 
            
                127,940
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2017
             | 
            
                -1.10 / -0.84%
             |             
            
                130.90
             |           
            
                131.50
             |               
            
                129.00
             |                           
            
                129.80
             | 
            
                130.11
             |                     
            
                40.20
             |                                 
            
                73,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2017
             | 
            
                +1.90 / +1.47%
             |             
            
                129.00
             |           
            
                131.00
             |               
            
                127.50
             |                           
            
                130.90
             | 
            
                129.18
             |                     
            
                40.55
             |                                 
            
                147,540
             |            
            
                 
             |                                       
         
    
        
            | 
                8/22/2017
             | 
            
                -2.00 / -1.53%
             |             
            
                130.70
             |           
            
                132.00
             |               
            
                129.00
             |                           
            
                129.00
             | 
            
                130.54
             |                     
            
                39.96
             |                                 
            
                134,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/21/2017
             | 
            
                -2.50 / -1.87%
             |             
            
                132.50
             |           
            
                133.10
             |               
            
                131.00
             |                           
            
                131.00
             | 
            
                132.33
             |                     
            
                40.58
             |                                 
            
                139,690
             |            
            
                 
             |                                       
         
    
        
            | 
                8/18/2017
             | 
            
                -2.00 / -1.48%
             |             
            
                135.00
             |           
            
                135.00
             |               
            
                133.10
             |                           
            
                133.50
             | 
            
                133.95
             |                     
            
                41.35
             |                                 
            
                67,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2017
             | 
            
                -0.50 / -0.37%
             |             
            
                136.00
             |           
            
                136.10
             |               
            
                135.00
             |                           
            
                135.50
             | 
            
                135.49
             |                     
            
                41.97
             |                                 
            
                70,890
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2017
             | 
            
                0.00 / 0.00%
             |             
            
                136.60
             |           
            
                138.50
             |               
            
                135.00
             |                           
            
                136.00
             | 
            
                137.24
             |                     
            
                42.12
             |                                 
            
                140,830
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/15/2017
             | 
            
                +5.10 / +3.90%
             |             
            
                132.00
             |           
            
                138.00
             |               
            
                131.00
             |                           
            
                136.00
             | 
            
                135.41
             |                     
            
                42.12
             |                                 
            
                288,220
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2017
             | 
            
                +1.80 / +1.39%
             |             
            
                130.00
             |           
            
                132.00
             |               
            
                129.50
             |                           
            
                130.90
             | 
            
                130.70
             |                     
            
                40.55
             |                                 
            
                57,200
             |  
            
                 
             |                                                              
             
    
         
    
    
 |