| 
                 
                    Closing price on 9/18/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    49.80 | 
                 
                
                    | High | 
                    49.90 | 
                 
                
                    | Low | 
                    49.60 | 
                     
                
                    | Volume | 
                    33,670 | 
                                 
                
                    | Split-adjusted Price | 
                    9.09 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2015
             | 
            
                +0.20 / +0.41%
             |             
            
                49.40
             |           
            
                49.40
             |               
            
                48.50
             |                           
            
                48.50
             | 
            
                48.96
             |                     
            
                8.83
             |                                 
            
                8,640
             |            
            
                 
             |                                       
         
    
        
            | 
                8/25/2015
             | 
            
                +0.30 / +0.63%
             |             
            
                49.50
             |           
            
                49.50
             |               
            
                48.00
             |                           
            
                48.30
             | 
            
                48.15
             |                     
            
                8.80
             |                                 
            
                7,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2015
             | 
            
                -0.30 / -0.62%
             |             
            
                49.70
             |           
            
                49.70
             |               
            
                45.00
             |                           
            
                48.00
             | 
            
                46.91
             |                     
            
                8.74
             |                                 
            
                8,740
             |            
            
                 
             |                                       
         
    
        
            | 
                8/21/2015
             | 
            
                -1.60 / -3.21%
             |             
            
                49.00
             |           
            
                50.00
             |               
            
                48.30
             |                           
            
                48.30
             | 
            
                48.46
             |                     
            
                8.80
             |                                 
            
                7,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2015
             | 
            
                -0.10 / -0.20%
             |             
            
                50.00
             |           
            
                50.00
             |               
            
                49.10
             |                           
            
                49.90
             | 
            
                50.00
             |                     
            
                9.09
             |                                 
            
                360
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2015
             | 
            
                0.00 / 0.00%
             |             
            
                49.50
             |           
            
                50.00
             |               
            
                49.50
             |                           
            
                50.00
             | 
            
                49.75
             |                     
            
                9.11
             |                                 
            
                2,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/18/2015
             | 
            
                -0.50 / -0.99%
             |             
            
                50.00
             |           
            
                50.00
             |               
            
                49.30
             |                           
            
                50.00
             | 
            
                49.64
             |                     
            
                9.11
             |                                 
            
                2,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2015
             | 
            
                +0.50 / +1.00%
             |             
            
                50.00
             |           
            
                51.00
             |               
            
                49.00
             |                           
            
                50.50
             | 
            
                49.03
             |                     
            
                9.20
             |                                 
            
                3,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2015
             | 
            
                +0.10 / +0.20%
             |             
            
                50.50
             |           
            
                50.50
             |               
            
                49.70
             |                           
            
                50.00
             | 
            
                49.88
             |                     
            
                9.11
             |                                 
            
                20,550
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2015
             | 
            
                -0.10 / -0.20%
             |             
            
                50.00
             |           
            
                50.00
             |               
            
                49.00
             |                           
            
                49.90
             | 
            
                49.27
             |                     
            
                9.09
             |                                 
            
                42,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2015
             | 
            
                -1.00 / -1.96%
             |             
            
                50.50
             |           
            
                51.00
             |               
            
                50.00
             |                           
            
                50.00
             | 
            
                50.51
             |                     
            
                9.11
             |                                 
            
                3,940
             |            
            
                 
             |                                       
         
    
        
            | 
                8/11/2015
             | 
            
                0.00 / 0.00%
             |             
            
                51.00
             |           
            
                51.00
             |               
            
                50.00
             |                           
            
                51.00
             | 
            
                50.97
             |                     
            
                9.29
             |                                 
            
                14,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2015
             | 
            
                +1.00 / +2.00%
             |             
            
                50.00
             |           
            
                51.00
             |               
            
                50.00
             |                           
            
                51.00
             | 
            
                50.50
             |                     
            
                9.29
             |                                 
            
                17,130
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2015
             | 
            
                -1.00 / -1.96%
             |             
            
                50.50
             |           
            
                50.50
             |               
            
                50.00
             |                           
            
                50.00
             | 
            
                50.29
             |                     
            
                9.11
             |                                 
            
                3,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |