| 
                 
                    Closing price on 11/18/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    69.50 | 
                 
                
                    | High | 
                    70.50 | 
                 
                
                    | Low | 
                    69.50 | 
                     
                
                    | Volume | 
                    67,770 | 
                                 
                
                    | Split-adjusted Price | 
                    12.75 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                11/18/2015
             | 
            
                0.00 / 0.00%
             |             
            
                69.50
             |           
            
                70.50
             |               
            
                69.50
             |                           
            
                70.00
             | 
            
                69.85
             |                     
            
                12.75
             |                                 
            
                67,770
             |            
            
                 
             |                                       
         
    
        
            | 
                11/17/2015
             | 
            
                -1.50 / -2.10%
             |             
            
                71.50
             |           
            
                71.50
             |               
            
                69.50
             |                           
            
                70.00
             | 
            
                70.53
             |                     
            
                12.75
             |                                 
            
                70,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/16/2015
             | 
            
                +1.50 / +2.14%
             |             
            
                70.50
             |           
            
                72.00
             |               
            
                69.00
             |                           
            
                71.50
             | 
            
                70.46
             |                     
            
                13.02
             |                                 
            
                105,890
             |            
            
                 
             |                                       
         
    
        
            | 
                11/13/2015
             | 
            
                +2.00 / +2.94%
             |             
            
                69.00
             |           
            
                70.50
             |               
            
                69.00
             |                           
            
                70.00
             | 
            
                69.74
             |                     
            
                12.75
             |                                 
            
                53,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/12/2015
             | 
            
                +4.00 / +6.25%
             |             
            
                64.00
             |           
            
                68.00
             |               
            
                64.00
             |                           
            
                68.00
             | 
            
                66.42
             |                     
            
                12.39
             |                                 
            
                52,560
             |            
            
                 
             |                                       
         
    
        
            | 
                11/11/2015
             | 
            
                -0.50 / -0.78%
             |             
            
                64.00
             |           
            
                65.00
             |               
            
                64.00
             |                           
            
                64.00
             | 
            
                64.43
             |                     
            
                11.66
             |                                 
            
                8,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/10/2015
             | 
            
                -1.00 / -1.53%
             |             
            
                64.50
             |           
            
                64.50
             |               
            
                64.00
             |                           
            
                64.50
             | 
            
                64.29
             |                     
            
                11.75
             |                                 
            
                25,290
             |            
            
                 
             |                                       
         
    
        
            | 
                11/9/2015
             | 
            
                +1.50 / +2.34%
             |             
            
                65.00
             |           
            
                65.50
             |               
            
                65.00
             |                           
            
                65.50
             | 
            
                65.04
             |                     
            
                11.93
             |                                 
            
                16,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/6/2015
             | 
            
                -2.50 / -3.76%
             |             
            
                66.00
             |           
            
                66.00
             |               
            
                63.00
             |                           
            
                64.00
             | 
            
                64.06
             |                     
            
                11.66
             |                                 
            
                51,390
             |            
            
                 
             |                                       
         
    
        
            | 
                11/5/2015
             | 
            
                0.00 / 0.00%
             |             
            
                67.00
             |           
            
                67.00
             |               
            
                66.00
             |                           
            
                66.50
             | 
            
                66.15
             |                     
            
                12.11
             |                                 
            
                13,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/4/2015
             | 
            
                0.00 / 0.00%
             |             
            
                67.50
             |           
            
                69.00
             |               
            
                66.50
             |                           
            
                66.50
             | 
            
                67.63
             |                     
            
                12.11
             |                                 
            
                61,230
             |            
            
                 
             |                                       
         
    
        
            | 
                11/3/2015
             | 
            
                +1.00 / +1.53%
             |             
            
                65.50
             |           
            
                67.00
             |               
            
                63.00
             |                           
            
                66.50
             | 
            
                64.67
             |                     
            
                12.11
             |                                 
            
                84,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/2/2015
             | 
            
                -4.50 / -6.43%
             |             
            
                70.50
             |           
            
                71.00
             |               
            
                65.50
             |                           
            
                65.50
             | 
            
                67.06
             |                     
            
                11.93
             |                                 
            
                134,130
             |            
            
                 
             |                                       
         
    
        
            | 
                10/30/2015
             | 
            
                -2.50 / -3.45%
             |             
            
                72.00
             |           
            
                72.00
             |               
            
                70.00
             |                           
            
                70.00
             | 
            
                70.37
             |                     
            
                12.75
             |                                 
            
                93,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/29/2015
             | 
            
                +1.50 / +2.11%
             |             
            
                71.00
             |           
            
                73.00
             |               
            
                70.00
             |                           
            
                72.50
             | 
            
                71.62
             |                     
            
                13.21
             |                                 
            
                101,830
             |            
            
                 
             |                                       
         
    
        
            | 
                10/28/2015
             | 
            
                +0.50 / +0.71%
             |             
            
                70.00
             |           
            
                73.00
             |               
            
                70.00
             |                           
            
                71.00
             | 
            
                71.61
             |                     
            
                12.93
             |                                 
            
                73,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/27/2015
             | 
            
                +4.50 / +6.82%
             |             
            
                65.50
             |           
            
                70.50
             |               
            
                65.50
             |                           
            
                70.50
             | 
            
                67.91
             |                     
            
                12.84
             |                                 
            
                96,720
             |            
            
                 
             |                                       
         
    
        
            | 
                10/26/2015
             | 
            
                -1.00 / -1.49%
             |             
            
                66.50
             |           
            
                66.50
             |               
            
                65.50
             |                           
            
                66.00
             | 
            
                66.11
             |                     
            
                12.02
             |                                 
            
                87,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/23/2015
             | 
            
                +2.00 / +3.08%
             |             
            
                65.50
             |           
            
                68.00
             |               
            
                65.50
             |                           
            
                67.00
             | 
            
                67.08
             |                     
            
                12.20
             |                                 
            
                79,440
             |            
            
                 
             |                                       
         
    
        
            | 
                10/22/2015
             | 
            
                +1.50 / +2.36%
             |             
            
                63.50
             |           
            
                65.00
             |               
            
                63.50
             |                           
            
                65.00
             | 
            
                64.23
             |                     
            
                11.84
             |                                 
            
                35,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/21/2015
             | 
            
                0.00 / 0.00%
             |             
            
                63.50
             |           
            
                65.00
             |               
            
                63.50
             |                           
            
                63.50
             | 
            
                63.97
             |                     
            
                11.57
             |                                 
            
                106,670
             |            
            
                 
             |                                       
         
    
        
            | 
                10/20/2015
             | 
            
                +2.00 / +3.25%
             |             
            
                62.50
             |           
            
                64.00
             |               
            
                62.50
             |                           
            
                63.50
             | 
            
                63.08
             |                     
            
                11.57
             |                                 
            
                104,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/19/2015
             | 
            
                +3.50 / +6.03%
             |             
            
                59.00
             |           
            
                62.00
             |               
            
                59.00
             |                           
            
                61.50
             | 
            
                61.05
             |                     
            
                11.20
             |                                 
            
                146,040
             |            
            
                 
             |                                       
         
    
        
            | 
                10/16/2015
             | 
            
                +0.50 / +0.87%
             |             
            
                57.50
             |           
            
                58.50
             |               
            
                57.50
             |                           
            
                58.00
             | 
            
                57.94
             |                     
            
                10.57
             |                                 
            
                75,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/15/2015
             | 
            
                -1.00 / -1.71%
             |             
            
                58.00
             |           
            
                58.50
             |               
            
                57.50
             |                           
            
                57.50
             | 
            
                57.78
             |                     
            
                10.47
             |                                 
            
                33,920
             |            
            
                 
             |                                       
         
    
        
            | 
                10/14/2015
             | 
            
                0.00 / 0.00%
             |             
            
                58.50
             |           
            
                58.50
             |               
            
                58.00
             |                           
            
                58.50
             | 
            
                58.08
             |                     
            
                10.66
             |                                 
            
                21,470
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/13/2015
             | 
            
                0.00 / 0.00%
             |             
            
                58.50
             |           
            
                59.00
             |               
            
                58.00
             |                           
            
                58.50
             | 
            
                58.16
             |                     
            
                10.66
             |                                 
            
                41,280
             |            
            
                 
             |                                       
         
    
        
            | 
                10/12/2015
             | 
            
                +1.50 / +2.63%
             |             
            
                57.50
             |           
            
                59.00
             |               
            
                57.50
             |                           
            
                58.50
             | 
            
                58.38
             |                     
            
                10.66
             |                                 
            
                106,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/9/2015
             | 
            
                +0.50 / +0.88%
             |             
            
                57.50
             |           
            
                58.00
             |               
            
                56.50
             |                           
            
                57.00
             | 
            
                57.31
             |                     
            
                10.38
             |                                 
            
                61,610
             |            
            
                 
             |                                       
         
    
        
            | 
                10/8/2015
             | 
            
                +0.50 / +0.89%
             |             
            
                57.00
             |           
            
                57.00
             |               
            
                55.50
             |                           
            
                56.50
             | 
            
                56.05
             |                     
            
                10.29
             |                                 
            
                27,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |