| 
                 
                    Closing price on 10/8/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    57.00 | 
                 
                
                    | High | 
                    57.00 | 
                 
                
                    | Low | 
                    55.50 | 
                     
                
                    | Volume | 
                    27,600 | 
                                 
                
                    | Split-adjusted Price | 
                    10.29 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/8/2015
             | 
            
                +0.50 / +0.89%
             |             
            
                57.00
             |           
            
                57.00
             |               
            
                55.50
             |                           
            
                56.50
             | 
            
                56.05
             |                     
            
                10.29
             |                                 
            
                27,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/7/2015
             | 
            
                -0.50 / -0.88%
             |             
            
                56.50
             |           
            
                57.00
             |               
            
                55.50
             |                           
            
                56.00
             | 
            
                56.09
             |                     
            
                10.20
             |                                 
            
                35,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/6/2015
             | 
            
                -1.00 / -1.74%
             |             
            
                57.50
             |           
            
                58.50
             |               
            
                56.50
             |                           
            
                56.50
             | 
            
                57.53
             |                     
            
                10.29
             |                                 
            
                118,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/5/2015
             | 
            
                +0.50 / +0.88%
             |             
            
                57.50
             |           
            
                57.50
             |               
            
                56.50
             |                           
            
                57.50
             | 
            
                56.99
             |                     
            
                10.47
             |                                 
            
                59,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/2/2015
             | 
            
                +2.50 / +4.59%
             |             
            
                54.50
             |           
            
                58.00
             |               
            
                53.50
             |                           
            
                57.00
             | 
            
                56.04
             |                     
            
                10.38
             |                                 
            
                137,550
             |            
            
                 
             |                                       
         
    
        
            | 
                10/1/2015
             | 
            
                -0.50 / -0.91%
             |             
            
                54.50
             |           
            
                54.50
             |               
            
                53.50
             |                           
            
                54.50
             | 
            
                53.88
             |                     
            
                9.93
             |                                 
            
                66,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/30/2015
             | 
            
                0.00 / 0.00%
             |             
            
                55.00
             |           
            
                55.00
             |               
            
                54.50
             |                           
            
                55.00
             | 
            
                54.68
             |                     
            
                10.02
             |                                 
            
                72,940
             |            
            
                 
             |                                       
         
    
        
            | 
                9/29/2015
             | 
            
                +1.00 / +1.85%
             |             
            
                54.00
             |           
            
                56.00
             |               
            
                53.50
             |                           
            
                55.00
             | 
            
                54.50
             |                     
            
                10.02
             |                                 
            
                85,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/28/2015
             | 
            
                +2.50 / +4.85%
             |             
            
                51.50
             |           
            
                55.00
             |               
            
                51.50
             |                           
            
                54.00
             | 
            
                53.54
             |                     
            
                9.84
             |                                 
            
                133,380
             |            
            
                 
             |                                       
         
    
        
            | 
                9/25/2015
             | 
            
                0.00 / 0.00%
             |             
            
                51.50
             |           
            
                52.00
             |               
            
                51.00
             |                           
            
                51.50
             | 
            
                51.51
             |                     
            
                9.38
             |                                 
            
                6,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/24/2015
             | 
            
                -0.50 / -0.96%
             |             
            
                51.00
             |           
            
                51.50
             |               
            
                51.00
             |                           
            
                51.50
             | 
            
                51.25
             |                     
            
                9.38
             |                                 
            
                1,730
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2015
             | 
            
                -0.50 / -0.95%
             |             
            
                51.50
             |           
            
                52.00
             |               
            
                51.00
             |                           
            
                52.00
             | 
            
                51.24
             |                     
            
                9.47
             |                                 
            
                5,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/22/2015
             | 
            
                +1.50 / +2.94%
             |             
            
                51.00
             |           
            
                53.00
             |               
            
                51.00
             |                           
            
                52.50
             | 
            
                52.25
             |                     
            
                9.56
             |                                 
            
                45,400
             |            
            
                 
             |                                       
         
    
        
            | 
                9/21/2015
             | 
            
                +1.10 / +2.20%
             |             
            
                49.90
             |           
            
                51.50
             |               
            
                49.80
             |                           
            
                51.00
             | 
            
                50.51
             |                     
            
                9.29
             |                                 
            
                26,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/18/2015
             | 
            
                +0.10 / +0.20%
             |             
            
                49.80
             |           
            
                49.90
             |               
            
                49.60
             |                           
            
                49.90
             | 
            
                49.63
             |                     
            
                9.09
             |                                 
            
                33,670
             |            
            
                 
             |                                       
         
    
        
            | 
                9/17/2015
             | 
            
                +0.20 / +0.40%
             |             
            
                49.50
             |           
            
                49.80
             |               
            
                49.50
             |                           
            
                49.80
             | 
            
                49.65
             |                     
            
                9.07
             |                                 
            
                8,610
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/16/2015
             | 
            
                -0.20 / -0.40%
             |             
            
                49.30
             |           
            
                49.60
             |               
            
                49.30
             |                           
            
                49.60
             | 
            
                49.32
             |                     
            
                9.03
             |                                 
            
                730
             |            
            
                 
             |                                       
         
    
        
            | 
                9/15/2015
             | 
            
                +0.20 / +0.40%
             |             
            
                49.60
             |           
            
                49.80
             |               
            
                49.60
             |                           
            
                49.80
             | 
            
                49.64
             |                     
            
                9.07
             |                                 
            
                8,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2015
             | 
            
                -0.30 / -0.60%
             |             
            
                49.60
             |           
            
                49.60
             |               
            
                49.60
             |                           
            
                49.60
             | 
            
                49.60
             |                     
            
                9.03
             |                                 
            
                1,610
             |            
            
                 
             |                                       
         
    
        
            | 
                9/11/2015
             | 
            
                +0.60 / +1.22%
             |             
            
                49.50
             |           
            
                50.00
             |               
            
                49.00
             |                           
            
                49.90
             | 
            
                49.64
             |                     
            
                9.09
             |                                 
            
                29,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2015
             | 
            
                -0.50 / -1.00%
             |             
            
                49.00
             |           
            
                50.00
             |               
            
                49.00
             |                           
            
                49.30
             | 
            
                49.67
             |                     
            
                8.98
             |                                 
            
                1,510
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2015
             | 
            
                +0.30 / +0.61%
             |             
            
                49.00
             |           
            
                49.80
             |               
            
                48.60
             |                           
            
                49.80
             | 
            
                48.90
             |                     
            
                9.07
             |                                 
            
                20,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/8/2015
             | 
            
                +0.30 / +0.61%
             |             
            
                48.50
             |           
            
                49.50
             |               
            
                48.50
             |                           
            
                49.50
             | 
            
                49.00
             |                     
            
                9.02
             |                                 
            
                27,120
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2015
             | 
            
                -0.30 / -0.61%
             |             
            
                48.60
             |           
            
                49.50
             |               
            
                48.00
             |                           
            
                49.20
             | 
            
                48.28
             |                     
            
                8.96
             |                                 
            
                1,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/4/2015
             | 
            
                +0.10 / +0.20%
             |             
            
                49.90
             |           
            
                49.90
             |               
            
                49.50
             |                           
            
                49.50
             | 
            
                49.70
             |                     
            
                9.02
             |                                 
            
                20
             |            
            
                 
             |                                       
         
    
        
            | 
                9/3/2015
             | 
            
                -0.10 / -0.20%
             |             
            
                49.00
             |           
            
                49.40
             |               
            
                48.60
             |                           
            
                49.40
             | 
            
                49.00
             |                     
            
                9.00
             |                                 
            
                6,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/1/2015
             | 
            
                0.00 / 0.00%
             |             
            
                49.00
             |           
            
                50.00
             |               
            
                49.00
             |                           
            
                49.50
             | 
            
                49.01
             |                     
            
                9.02
             |                                 
            
                42,260
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2015
             | 
            
                -1.00 / -1.98%
             |             
            
                49.20
             |           
            
                50.00
             |               
            
                49.10
             |                           
            
                49.50
             | 
            
                49.55
             |                     
            
                9.02
             |                                 
            
                2,240
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2015
             | 
            
                +0.50 / +1.00%
             |             
            
                50.00
             |           
            
                50.50
             |               
            
                49.90
             |                           
            
                50.50
             | 
            
                50.03
             |                     
            
                9.20
             |                                 
            
                14,990
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2015
             | 
            
                +1.50 / +3.09%
             |             
            
                49.50
             |           
            
                50.00
             |               
            
                49.00
             |                           
            
                50.00
             | 
            
                49.18
             |                     
            
                9.11
             |                                 
            
                6,100
             |  
            
                 
             |                                                              
             
    
         
    
    
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