| 
                 
                    Closing price on 3/7/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    123.00 | 
                 
                
                    | High | 
                    125.00 | 
                 
                
                    | Low | 
                    122.70 | 
                     
                
                    | Volume | 
                    33,310 | 
                                 
                
                    | Split-adjusted Price | 
                    38.07 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/7/2018
             | 
            
                +0.20 / +0.16%
             |             
            
                123.00
             |           
            
                125.00
             |               
            
                122.70
             |                           
            
                122.90
             | 
            
                123.36
             |                     
            
                38.07
             |                                 
            
                33,310
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2018
             | 
            
                +0.20 / +0.16%
             |             
            
                122.00
             |           
            
                123.30
             |               
            
                122.00
             |                           
            
                122.70
             | 
            
                122.98
             |                     
            
                38.01
             |                                 
            
                19,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2018
             | 
            
                -1.00 / -0.81%
             |             
            
                124.00
             |           
            
                124.00
             |               
            
                122.00
             |                           
            
                122.50
             | 
            
                122.45
             |                     
            
                37.94
             |                                 
            
                44,550
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2018
             | 
            
                -1.00 / -0.80%
             |             
            
                124.50
             |           
            
                124.50
             |               
            
                122.30
             |                           
            
                123.50
             | 
            
                123.37
             |                     
            
                38.25
             |                                 
            
                46,940
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2018
             | 
            
                -1.00 / -0.80%
             |             
            
                125.50
             |           
            
                125.50
             |               
            
                124.50
             |                           
            
                124.50
             | 
            
                124.77
             |                     
            
                38.56
             |                                 
            
                26,120
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2018
             | 
            
                +0.50 / +0.40%
             |             
            
                125.10
             |           
            
                127.50
             |               
            
                125.00
             |                           
            
                125.50
             | 
            
                126.11
             |                     
            
                38.87
             |                                 
            
                47,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2018
             | 
            
                +3.50 / +2.88%
             |             
            
                122.90
             |           
            
                125.00
             |               
            
                121.60
             |                           
            
                125.00
             | 
            
                122.57
             |                     
            
                38.72
             |                                 
            
                71,740
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2018
             | 
            
                -4.50 / -3.57%
             |             
            
                125.00
             |           
            
                125.10
             |               
            
                121.10
             |                           
            
                121.50
             | 
            
                122.63
             |                     
            
                37.63
             |                                 
            
                63,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/23/2018
             | 
            
                -1.90 / -1.49%
             |             
            
                126.00
             |           
            
                127.50
             |               
            
                123.00
             |                           
            
                126.00
             | 
            
                124.27
             |                     
            
                39.03
             |                                 
            
                80,230
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2018
             | 
            
                -0.80 / -0.62%
             |             
            
                126.70
             |           
            
                129.00
             |               
            
                126.00
             |                           
            
                127.90
             | 
            
                127.27
             |                     
            
                39.62
             |                                 
            
                31,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2018
             | 
            
                -1.20 / -0.92%
             |             
            
                130.00
             |           
            
                130.00
             |               
            
                128.50
             |                           
            
                128.70
             | 
            
                129.35
             |                     
            
                39.86
             |                                 
            
                13,460
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2018
             | 
            
                +1.90 / +1.48%
             |             
            
                128.00
             |           
            
                131.00
             |               
            
                128.00
             |                           
            
                129.90
             | 
            
                129.71
             |                     
            
                40.24
             |                                 
            
                41,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/12/2018
             | 
            
                +2.10 / +1.67%
             |             
            
                128.00
             |           
            
                128.00
             |               
            
                126.00
             |                           
            
                128.00
             | 
            
                127.47
             |                     
            
                39.65
             |                                 
            
                14,850
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2018
             | 
            
                +3.40 / +2.78%
             |             
            
                118.00
             |           
            
                125.90
             |               
            
                118.00
             |                           
            
                125.90
             | 
            
                121.85
             |                     
            
                39.00
             |                                 
            
                117,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2018
             | 
            
                -1.00 / -0.81%
             |             
            
                120.70
             |           
            
                126.00
             |               
            
                120.70
             |                           
            
                122.50
             | 
            
                123.19
             |                     
            
                37.94
             |                                 
            
                80,590
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2018
             | 
            
                +2.50 / +2.07%
             |             
            
                126.00
             |           
            
                126.00
             |               
            
                122.10
             |                           
            
                123.50
             | 
            
                123.43
             |                     
            
                38.25
             |                                 
            
                172,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2018
             | 
            
                -6.00 / -4.72%
             |             
            
                123.00
             |           
            
                126.00
             |               
            
                118.50
             |                           
            
                121.00
             | 
            
                120.59
             |                     
            
                37.48
             |                                 
            
                266,760
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2018
             | 
            
                -2.00 / -1.55%
             |             
            
                126.00
             |           
            
                130.00
             |               
            
                126.00
             |                           
            
                127.00
             | 
            
                127.01
             |                     
            
                39.34
             |                                 
            
                160,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2018
             | 
            
                +1.80 / +1.42%
             |             
            
                127.50
             |           
            
                129.00
             |               
            
                126.00
             |                           
            
                129.00
             | 
            
                127.25
             |                     
            
                39.96
             |                                 
            
                155,560
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2018
             | 
            
                -0.10 / -0.08%
             |             
            
                128.00
             |           
            
                129.90
             |               
            
                127.10
             |                           
            
                127.20
             | 
            
                127.56
             |                     
            
                39.40
             |                                 
            
                155,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2018
             | 
            
                -1.90 / -1.47%
             |             
            
                132.00
             |           
            
                132.00
             |               
            
                127.00
             |                           
            
                127.30
             | 
            
                128.54
             |                     
            
                39.43
             |                                 
            
                264,920
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2018
             | 
            
                +1.20 / +0.94%
             |             
            
                126.20
             |           
            
                131.00
             |               
            
                126.20
             |                           
            
                129.20
             | 
            
                128.23
             |                     
            
                40.02
             |                                 
            
                157,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2018
             | 
            
                -2.00 / -1.54%
             |             
            
                132.00
             |           
            
                132.00
             |               
            
                127.00
             |                           
            
                128.00
             | 
            
                127.70
             |                     
            
                39.65
             |                                 
            
                130,370
             |            
            
                 
             |                                       
         
    
        
            | 
                1/26/2018
             | 
            
                -2.70 / -2.03%
             |             
            
                133.00
             |           
            
                133.00
             |               
            
                128.50
             |                           
            
                130.00
             | 
            
                129.47
             |                     
            
                40.27
             |                                 
            
                108,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2018
             | 
            
                -5.30 / -3.84%
             |             
            
                137.00
             |           
            
                137.00
             |               
            
                132.00
             |                           
            
                132.70
             | 
            
                133.10
             |                     
            
                41.10
             |                                 
            
                276,960
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2018
             | 
            
                -1.90 / -1.36%
             |             
            
                140.00
             |           
            
                140.00
             |               
            
                136.00
             |                           
            
                138.00
             | 
            
                138.21
             |                     
            
                42.74
             |                                 
            
                131,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2018
             | 
            
                +2.40 / +1.75%
             |             
            
                137.30
             |           
            
                141.00
             |               
            
                137.30
             |                           
            
                139.90
             | 
            
                139.66
             |                     
            
                43.33
             |                                 
            
                163,820
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2018
             | 
            
                0.00 / 0.00%
             |             
            
                137.00
             |           
            
                138.00
             |               
            
                136.50
             |                           
            
                137.50
             | 
            
                136.98
             |                     
            
                42.59
             |                                 
            
                99,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/17/2018
             | 
            
                -2.50 / -1.79%
             |             
            
                140.40
             |           
            
                140.70
             |               
            
                137.50
             |                           
            
                137.50
             | 
            
                139.30
             |                     
            
                42.59
             |                                 
            
                121,330
             |            
            
                 
             |                                       
         
    
        
            | 
                1/16/2018
             | 
            
                +1.80 / +1.30%
             |             
            
                138.00
             |           
            
                141.00
             |               
            
                137.60
             |                           
            
                140.00
             | 
            
                139.44
             |                     
            
                43.36
             |                                 
            
                112,740
             |  
            
                 
             |                                                              
             
    
         
    
    
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