| 
                 
                    Closing price on 5/3/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    126.20 | 
                 
                
                    | High | 
                    128.90 | 
                 
                
                    | Low | 
                    126.20 | 
                     
                
                    | Volume | 
                    21,740 | 
                                 
                
                    | Split-adjusted Price | 
                    32.74 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/3/2017
             | 
            
                +0.80 / +0.63%
             |             
            
                126.20
             |           
            
                128.90
             |               
            
                126.20
             |                           
            
                127.80
             | 
            
                127.89
             |                     
            
                32.74
             |                                 
            
                21,740
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2017
             | 
            
                +2.50 / +2.01%
             |             
            
                125.00
             |           
            
                128.90
             |               
            
                124.00
             |                           
            
                127.00
             | 
            
                126.56
             |                     
            
                32.54
             |                                 
            
                38,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2017
             | 
            
                +2.50 / +2.05%
             |             
            
                122.00
             |           
            
                124.50
             |               
            
                122.00
             |                           
            
                124.50
             | 
            
                124.00
             |                     
            
                31.90
             |                                 
            
                24,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2017
             | 
            
                +0.30 / +0.25%
             |             
            
                121.00
             |           
            
                122.70
             |               
            
                121.00
             |                           
            
                122.00
             | 
            
                122.08
             |                     
            
                31.26
             |                                 
            
                12,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2017
             | 
            
                -1.00 / -0.81%
             |             
            
                121.10
             |           
            
                123.00
             |               
            
                120.50
             |                           
            
                121.70
             | 
            
                121.22
             |                     
            
                31.18
             |                                 
            
                48,760
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2017
             | 
            
                -1.70 / -1.37%
             |             
            
                123.00
             |           
            
                124.50
             |               
            
                122.00
             |                           
            
                122.70
             | 
            
                122.63
             |                     
            
                31.44
             |                                 
            
                40,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2017
             | 
            
                +0.40 / +0.32%
             |             
            
                125.80
             |           
            
                125.80
             |               
            
                124.00
             |                           
            
                124.40
             | 
            
                124.58
             |                     
            
                31.87
             |                                 
            
                22,210
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2017
             | 
            
                -2.00 / -1.59%
             |             
            
                126.00
             |           
            
                126.10
             |               
            
                122.80
             |                           
            
                124.00
             | 
            
                123.54
             |                     
            
                31.77
             |                                 
            
                80,660
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2017
             | 
            
                +1.20 / +0.96%
             |             
            
                126.80
             |           
            
                126.80
             |               
            
                125.70
             |                           
            
                126.00
             | 
            
                126.06
             |                     
            
                32.28
             |                                 
            
                17,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2017
             | 
            
                +2.20 / +1.79%
             |             
            
                122.60
             |           
            
                125.00
             |               
            
                122.60
             |                           
            
                124.80
             | 
            
                123.55
             |                     
            
                31.97
             |                                 
            
                33,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2017
             | 
            
                -4.90 / -3.84%
             |             
            
                127.50
             |           
            
                130.30
             |               
            
                122.50
             |                           
            
                122.60
             | 
            
                124.46
             |                     
            
                31.41
             |                                 
            
                68,360
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2017
             | 
            
                -2.10 / -1.62%
             |             
            
                129.00
             |           
            
                131.00
             |               
            
                127.20
             |                           
            
                127.50
             | 
            
                128.20
             |                     
            
                32.67
             |                                 
            
                78,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2017
             | 
            
                0.00 / 0.00%
             |             
            
                131.60
             |           
            
                131.60
             |               
            
                129.00
             |                           
            
                129.60
             | 
            
                129.85
             |                     
            
                33.20
             |                                 
            
                26,030
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2017
             | 
            
                -3.40 / -2.56%
             |             
            
                133.00
             |           
            
                134.00
             |               
            
                129.60
             |                           
            
                129.60
             | 
            
                130.12
             |                     
            
                33.20
             |                                 
            
                227,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2017
             | 
            
                +0.90 / +0.68%
             |             
            
                132.10
             |           
            
                133.00
             |               
            
                132.00
             |                           
            
                133.00
             | 
            
                132.20
             |                     
            
                34.08
             |                                 
            
                25,030
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2017
             | 
            
                -2.90 / -2.15%
             |             
            
                131.10
             |           
            
                134.50
             |               
            
                131.10
             |                           
            
                132.10
             | 
            
                131.96
             |                     
            
                33.84
             |                                 
            
                35,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/7/2017
             | 
            
                +0.80 / +0.60%
             |             
            
                133.10
             |           
            
                135.00
             |               
            
                132.00
             |                           
            
                135.00
             | 
            
                133.60
             |                     
            
                34.59
             |                                 
            
                94,440
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2017
             | 
            
                0.00 / 0.00%
             |             
            
                134.20
             |           
            
                134.20
             |               
            
                131.00
             |                           
            
                134.20
             | 
            
                133.29
             |                     
            
                34.38
             |                                 
            
                34,030
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2017
             | 
            
                -2.60 / -1.90%
             |             
            
                135.00
             |           
            
                135.90
             |               
            
                134.20
             |                           
            
                134.20
             | 
            
                134.98
             |                     
            
                34.38
             |                                 
            
                47,090
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2017
             | 
            
                -0.20 / -0.15%
             |             
            
                138.60
             |           
            
                138.60
             |               
            
                135.00
             |                           
            
                136.80
             | 
            
                135.97
             |                     
            
                35.05
             |                                 
            
                15,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2017
             | 
            
                +2.00 / +1.48%
             |             
            
                135.00
             |           
            
                138.00
             |               
            
                135.00
             |                           
            
                137.00
             | 
            
                136.68
             |                     
            
                35.10
             |                                 
            
                42,590
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2017
             | 
            
                +2.60 / +1.96%
             |             
            
                132.50
             |           
            
                136.00
             |               
            
                132.50
             |                           
            
                135.00
             | 
            
                134.79
             |                     
            
                34.59
             |                                 
            
                93,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2017
             | 
            
                +0.60 / +0.46%
             |             
            
                133.70
             |           
            
                133.70
             |               
            
                131.60
             |                           
            
                132.40
             | 
            
                132.11
             |                     
            
                33.92
             |                                 
            
                27,060
             |            
            
                 
             |                                       
         
    
        
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |