| 
                 
                    Closing price on 5/25/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    135.50 | 
                 
                
                    | High | 
                    136.50 | 
                 
                
                    | Low | 
                    135.00 | 
                     
                
                    | Volume | 
                    81,710 | 
                                 
                
                    | Split-adjusted Price | 
                    34.61 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/25/2017
             | 
            
                +0.60 / +0.45%
             |             
            
                135.50
             |           
            
                136.50
             |               
            
                135.00
             |                           
            
                135.10
             | 
            
                135.43
             |                     
            
                34.61
             |                                 
            
                81,710
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2017
             | 
            
                +1.60 / +1.20%
             |             
            
                132.50
             |           
            
                135.10
             |               
            
                132.50
             |                           
            
                134.50
             | 
            
                134.29
             |                     
            
                34.46
             |                                 
            
                45,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2017
             | 
            
                +2.50 / +1.92%
             |             
            
                129.10
             |           
            
                134.00
             |               
            
                129.10
             |                           
            
                132.90
             | 
            
                132.35
             |                     
            
                34.05
             |                                 
            
                35,610
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2017
             | 
            
                -0.10 / -0.08%
             |             
            
                130.50
             |           
            
                131.10
             |               
            
                129.00
             |                           
            
                130.40
             | 
            
                130.47
             |                     
            
                33.41
             |                                 
            
                29,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/19/2017
             | 
            
                +0.50 / +0.38%
             |             
            
                132.50
             |           
            
                132.50
             |               
            
                130.00
             |                           
            
                130.50
             | 
            
                130.32
             |                     
            
                33.43
             |                                 
            
                19,260
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2017
             | 
            
                -2.50 / -1.89%
             |             
            
                133.70
             |           
            
                133.80
             |               
            
                130.00
             |                           
            
                130.00
             | 
            
                132.95
             |                     
            
                33.31
             |                                 
            
                56,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2017
             | 
            
                +5.50 / +4.33%
             |             
            
                127.00
             |           
            
                132.90
             |               
            
                127.00
             |                           
            
                132.50
             | 
            
                131.07
             |                     
            
                33.95
             |                                 
            
                89,370
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2017
             | 
            
                -0.30 / -0.24%
             |             
            
                127.30
             |           
            
                127.50
             |               
            
                126.00
             |                           
            
                127.00
             | 
            
                127.18
             |                     
            
                32.54
             |                                 
            
                29,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2017
             | 
            
                +2.30 / +1.84%
             |             
            
                125.50
             |           
            
                127.50
             |               
            
                125.50
             |                           
            
                127.30
             | 
            
                126.77
             |                     
            
                32.62
             |                                 
            
                26,310
             |            
            
                 
             |                                       
         
    
        
            | 
                5/12/2017
             | 
            
                -1.00 / -0.79%
             |             
            
                126.00
             |           
            
                126.00
             |               
            
                124.00
             |                           
            
                125.00
             | 
            
                125.20
             |                     
            
                32.03
             |                                 
            
                16,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2017
             | 
            
                +0.60 / +0.48%
             |             
            
                125.50
             |           
            
                127.00
             |               
            
                125.40
             |                           
            
                126.00
             | 
            
                125.92
             |                     
            
                32.28
             |                                 
            
                19,090
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2017
             | 
            
                +1.80 / +1.46%
             |             
            
                123.60
             |           
            
                125.40
             |               
            
                123.60
             |                           
            
                125.40
             | 
            
                124.53
             |                     
            
                32.13
             |                                 
            
                28,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2017
             | 
            
                -0.40 / -0.32%
             |             
            
                123.00
             |           
            
                125.00
             |               
            
                123.00
             |                           
            
                123.60
             | 
            
                123.99
             |                     
            
                31.67
             |                                 
            
                28,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2017
             | 
            
                -1.20 / -0.96%
             |             
            
                125.60
             |           
            
                126.00
             |               
            
                124.00
             |                           
            
                124.00
             | 
            
                124.79
             |                     
            
                31.77
             |                                 
            
                28,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2017
             | 
            
                -2.10 / -1.65%
             |             
            
                127.30
             |           
            
                127.60
             |               
            
                125.10
             |                           
            
                125.20
             | 
            
                125.79
             |                     
            
                32.08
             |                                 
            
                24,920
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2017
             | 
            
                -0.50 / -0.39%
             |             
            
                127.80
             |           
            
                128.70
             |               
            
                127.30
             |                           
            
                127.30
             | 
            
                127.90
             |                     
            
                32.62
             |                                 
            
                18,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |