| 
                 
                    Closing price on 8/8/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    67.60 | 
                 
                
                    | High | 
                    68.20 | 
                 
                
                    | Low | 
                    66.00 | 
                     
                
                    | Volume | 
                    167,230 | 
                                 
                
                    | Split-adjusted Price | 
                    38.24 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/8/2019
             | 
            
                +0.10 / +0.15%
             |             
            
                67.60
             |           
            
                68.20
             |               
            
                66.00
             |                           
            
                68.00
             | 
            
                67.46
             |                     
            
                38.24
             |                                 
            
                167,230
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2019
             | 
            
                -0.10 / -0.15%
             |             
            
                68.40
             |           
            
                68.50
             |               
            
                67.50
             |                           
            
                67.90
             | 
            
                67.86
             |                     
            
                38.18
             |                                 
            
                63,405
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2019
             | 
            
                +0.40 / +0.59%
             |             
            
                67.00
             |           
            
                69.00
             |               
            
                67.00
             |                           
            
                68.00
             | 
            
                68.15
             |                     
            
                38.24
             |                                 
            
                101,930
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2019
             | 
            
                -0.30 / -0.44%
             |             
            
                67.90
             |           
            
                68.20
             |               
            
                66.80
             |                           
            
                67.60
             | 
            
                67.35
             |                     
            
                38.01
             |                                 
            
                166,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2019
             | 
            
                +0.40 / +0.59%
             |             
            
                66.70
             |           
            
                68.40
             |               
            
                66.70
             |                           
            
                67.90
             | 
            
                67.84
             |                     
            
                38.18
             |                                 
            
                169,615
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2019
             | 
            
                +2.00 / +3.05%
             |             
            
                65.50
             |           
            
                68.00
             |               
            
                65.10
             |                           
            
                67.50
             | 
            
                66.65
             |                     
            
                37.96
             |                                 
            
                99,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/31/2019
             | 
            
                +0.80 / +1.24%
             |             
            
                64.10
             |           
            
                65.70
             |               
            
                64.10
             |                           
            
                65.50
             | 
            
                65.23
             |                     
            
                36.83
             |                                 
            
                86,760
             |            
            
                 
             |                                       
         
    
        
            | 
                7/30/2019
             | 
            
                -2.30 / -3.43%
             |             
            
                66.80
             |           
            
                67.50
             |               
            
                64.50
             |                           
            
                64.70
             | 
            
                65.51
             |                     
            
                36.38
             |                                 
            
                368,053
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/29/2019
             | 
            
                -1.10 / -1.62%
             |             
            
                68.20
             |           
            
                68.50
             |               
            
                66.50
             |                           
            
                67.00
             | 
            
                67.30
             |                     
            
                37.67
             |                                 
            
                191,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2019
             | 
            
                -1.30 / -1.87%
             |             
            
                69.00
             |           
            
                69.80
             |               
            
                68.10
             |                           
            
                68.10
             | 
            
                69.16
             |                     
            
                38.29
             |                                 
            
                137,030
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2019
             | 
            
                +0.90 / +1.31%
             |             
            
                67.80
             |           
            
                69.40
             |               
            
                67.80
             |                           
            
                69.40
             | 
            
                68.89
             |                     
            
                39.02
             |                                 
            
                145,333
             |            
            
                 
             |                                       
         
    
        
            | 
                7/24/2019
             | 
            
                +1.00 / +1.48%
             |             
            
                67.50
             |           
            
                68.50
             |               
            
                67.30
             |                           
            
                68.50
             | 
            
                67.93
             |                     
            
                38.52
             |                                 
            
                138,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/23/2019
             | 
            
                -0.50 / -0.74%
             |             
            
                68.00
             |           
            
                68.00
             |               
            
                66.50
             |                           
            
                67.50
             | 
            
                67.38
             |                     
            
                37.96
             |                                 
            
                251,740
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2019
             | 
            
                +0.30 / +0.44%
             |             
            
                67.50
             |           
            
                68.20
             |               
            
                67.30
             |                           
            
                68.00
             | 
            
                67.70
             |                     
            
                38.24
             |                                 
            
                150,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2019
             | 
            
                -0.60 / -0.88%
             |             
            
                67.90
             |           
            
                68.30
             |               
            
                67.60
             |                           
            
                67.70
             | 
            
                67.88
             |                     
            
                38.07
             |                                 
            
                123,920
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2019
             | 
            
                +0.80 / +1.19%
             |             
            
                67.50
             |           
            
                68.50
             |               
            
                67.30
             |                           
            
                68.30
             | 
            
                68.09
             |                     
            
                38.41
             |                                 
            
                149,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/17/2019
             | 
            
                -1.00 / -1.46%
             |             
            
                68.20
             |           
            
                68.50
             |               
            
                67.40
             |                           
            
                67.50
             | 
            
                67.88
             |                     
            
                37.96
             |                                 
            
                253,360
             |            
            
                 
             |                                       
         
    
        
            | 
                7/16/2019
             | 
            
                -2.20 / -3.11%
             |             
            
                70.40
             |           
            
                70.50
             |               
            
                68.10
             |                           
            
                68.50
             | 
            
                69.16
             |                     
            
                38.52
             |                                 
            
                689,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2019
             | 
            
                -0.40 / -0.56%
             |             
            
                71.10
             |           
            
                71.70
             |               
            
                70.50
             |                           
            
                70.70
             | 
            
                71.04
             |                     
            
                39.76
             |                                 
            
                161,070
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2019
             | 
            
                +1.20 / +1.72%
             |             
            
                69.90
             |           
            
                71.30
             |               
            
                69.40
             |                           
            
                71.10
             | 
            
                70.09
             |                     
            
                39.98
             |                                 
            
                225,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2019
             | 
            
                -1.40 / -1.96%
             |             
            
                71.20
             |           
            
                71.30
             |               
            
                69.70
             |                           
            
                69.90
             | 
            
                70.35
             |                     
            
                39.31
             |                                 
            
                201,940
             |            
            
                 
             |                                       
         
    
        
            | 
                7/10/2019
             | 
            
                +1.00 / +1.42%
             |             
            
                70.30
             |           
            
                71.40
             |               
            
                70.20
             |                           
            
                71.30
             | 
            
                70.95
             |                     
            
                40.09
             |                                 
            
                219,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/9/2019
             | 
            
                +0.10 / +0.14%
             |             
            
                70.10
             |           
            
                71.30
             |               
            
                70.00
             |                           
            
                70.30
             | 
            
                70.57
             |                     
            
                39.53
             |                                 
            
                113,710
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2019
             | 
            
                -0.90 / -1.27%
             |             
            
                71.20
             |           
            
                71.30
             |               
            
                70.00
             |                           
            
                70.20
             | 
            
                70.41
             |                     
            
                39.47
             |                                 
            
                175,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2019
             | 
            
                +0.10 / +0.14%
             |             
            
                71.00
             |           
            
                72.00
             |               
            
                71.00
             |                           
            
                71.10
             | 
            
                71.48
             |                     
            
                39.98
             |                                 
            
                151,640
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2019
             | 
            
                0.00 / 0.00%
             |             
            
                71.30
             |           
            
                71.50
             |               
            
                70.50
             |                           
            
                71.00
             | 
            
                71.11
             |                     
            
                39.92
             |                                 
            
                108,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/3/2019
             | 
            
                +2.00 / +2.90%
             |             
            
                69.00
             |           
            
                71.10
             |               
            
                69.00
             |                           
            
                71.00
             | 
            
                70.50
             |                     
            
                39.92
             |                                 
            
                250,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/2/2019
             | 
            
                -1.50 / -2.13%
             |             
            
                70.90
             |           
            
                70.90
             |               
            
                69.00
             |                           
            
                69.00
             | 
            
                69.81
             |                     
            
                38.80
             |                                 
            
                135,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2019
             | 
            
                +2.70 / +3.98%
             |             
            
                68.00
             |           
            
                70.50
             |               
            
                68.00
             |                           
            
                70.50
             | 
            
                69.83
             |                     
            
                39.64
             |                                 
            
                435,840
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2019
             | 
            
                +0.20 / +0.30%
             |             
            
                68.00
             |           
            
                68.00
             |               
            
                67.40
             |                           
            
                67.80
             | 
            
                67.71
             |                     
            
                38.12
             |                                 
            
                67,510
             |  
            
                 
             |                                                              
             
    
         
    
    
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