| 
                 
                    Closing price on 2/19/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    83.00 | 
                 
                
                    | High | 
                    84.00 | 
                 
                
                    | Low | 
                    83.00 | 
                     
                
                    | Volume | 
                    20,080 | 
                                 
                
                    | Split-adjusted Price | 
                    15.21 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/19/2016
             | 
            
                -0.50 / -0.60%
             |             
            
                83.00
             |           
            
                84.00
             |               
            
                83.00
             |                           
            
                83.50
             | 
            
                83.86
             |                     
            
                15.21
             |                                 
            
                20,080
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2016
             | 
            
                -1.00 / -1.18%
             |             
            
                86.00
             |           
            
                86.00
             |               
            
                84.00
             |                           
            
                84.00
             | 
            
                84.75
             |                     
            
                15.30
             |                                 
            
                38,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2016
             | 
            
                +2.00 / +2.41%
             |             
            
                83.00
             |           
            
                85.50
             |               
            
                83.00
             |                           
            
                85.00
             | 
            
                84.37
             |                     
            
                15.48
             |                                 
            
                76,220
             |            
            
                 
             |                                       
         
    
        
            | 
                2/16/2016
             | 
            
                0.00 / 0.00%
             |             
            
                83.00
             |           
            
                83.50
             |               
            
                81.00
             |                           
            
                83.00
             | 
            
                82.65
             |                     
            
                15.12
             |                                 
            
                18,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/15/2016
             | 
            
                +4.00 / +5.06%
             |             
            
                79.00
             |           
            
                84.00
             |               
            
                77.00
             |                           
            
                83.00
             | 
            
                79.82
             |                     
            
                15.12
             |                                 
            
                74,770
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2016
             | 
            
                +1.50 / +1.94%
             |             
            
                79.00
             |           
            
                80.00
             |               
            
                78.00
             |                           
            
                79.00
             | 
            
                79.22
             |                     
            
                14.39
             |                                 
            
                13,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/4/2016
             | 
            
                -0.50 / -0.64%
             |             
            
                78.00
             |           
            
                79.50
             |               
            
                77.50
             |                           
            
                77.50
             | 
            
                77.99
             |                     
            
                14.12
             |                                 
            
                3,180
             |            
            
                 
             |                                       
         
    
        
            | 
                2/3/2016
             | 
            
                +2.50 / +3.31%
             |             
            
                75.00
             |           
            
                78.00
             |               
            
                74.00
             |                           
            
                78.00
             | 
            
                76.05
             |                     
            
                14.21
             |                                 
            
                54,030
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2016
             | 
            
                -1.00 / -1.31%
             |             
            
                76.00
             |           
            
                76.00
             |               
            
                75.00
             |                           
            
                75.50
             | 
            
                75.87
             |                     
            
                13.75
             |                                 
            
                17,200
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2016
             | 
            
                -2.00 / -2.55%
             |             
            
                78.00
             |           
            
                78.50
             |               
            
                76.50
             |                           
            
                76.50
             | 
            
                77.25
             |                     
            
                13.94
             |                                 
            
                35,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2016
             | 
            
                -1.00 / -1.26%
             |             
            
                79.00
             |           
            
                79.00
             |               
            
                78.50
             |                           
            
                78.50
             | 
            
                78.66
             |                     
            
                14.30
             |                                 
            
                29,020
             |            
            
                 
             |                                       
         
    
        
            | 
                1/28/2016
             | 
            
                -0.50 / -0.63%
             |             
            
                80.50
             |           
            
                80.50
             |               
            
                79.00
             |                           
            
                79.50
             | 
            
                79.60
             |                     
            
                14.48
             |                                 
            
                12,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/27/2016
             | 
            
                +0.50 / +0.63%
             |             
            
                80.00
             |           
            
                80.00
             |               
            
                79.00
             |                           
            
                80.00
             | 
            
                79.54
             |                     
            
                14.57
             |                                 
            
                36,310
             |            
            
                 
             |                                       
         
    
        
            | 
                1/26/2016
             | 
            
                0.00 / 0.00%
             |             
            
                77.50
             |           
            
                80.50
             |               
            
                77.50
             |                           
            
                79.50
             | 
            
                78.92
             |                     
            
                14.48
             |                                 
            
                29,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2016
             | 
            
                +1.00 / +1.27%
             |             
            
                78.50
             |           
            
                80.50
             |               
            
                78.50
             |                           
            
                79.50
             | 
            
                79.78
             |                     
            
                14.48
             |                                 
            
                41,190
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2016
             | 
            
                -1.00 / -1.26%
             |             
            
                80.00
             |           
            
                80.00
             |               
            
                77.50
             |                           
            
                78.50
             | 
            
                78.68
             |                     
            
                14.30
             |                                 
            
                54,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/21/2016
             | 
            
                +3.50 / +4.61%
             |             
            
                80.00
             |           
            
                80.50
             |               
            
                78.00
             |                           
            
                79.50
             | 
            
                78.91
             |                     
            
                14.48
             |                                 
            
                104,360
             |            
            
                 
             |                                       
         
    
        
            | 
                1/20/2016
             | 
            
                0.00 / 0.00%
             |             
            
                76.50
             |           
            
                76.50
             |               
            
                74.50
             |                           
            
                76.00
             | 
            
                75.42
             |                     
            
                13.84
             |                                 
            
                20,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2016
             | 
            
                +1.50 / +2.01%
             |             
            
                74.00
             |           
            
                76.00
             |               
            
                74.00
             |                           
            
                76.00
             | 
            
                75.06
             |                     
            
                13.84
             |                                 
            
                11,810
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2016
             | 
            
                +1.50 / +2.05%
             |             
            
                72.50
             |           
            
                78.00
             |               
            
                72.00
             |                           
            
                74.50
             | 
            
                73.73
             |                     
            
                13.57
             |                                 
            
                51,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/15/2016
             | 
            
                -1.00 / -1.35%
             |             
            
                74.00
             |           
            
                74.00
             |               
            
                73.00
             |                           
            
                73.00
             | 
            
                73.14
             |                     
            
                13.30
             |                                 
            
                17,460
             |            
            
                 
             |                                       
         
    
        
            | 
                1/14/2016
             | 
            
                -1.50 / -1.99%
             |             
            
                74.50
             |           
            
                74.50
             |               
            
                72.50
             |                           
            
                74.00
             | 
            
                73.58
             |                     
            
                13.48
             |                                 
            
                35,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/13/2016
             | 
            
                -0.50 / -0.66%
             |             
            
                76.00
             |           
            
                76.00
             |               
            
                75.50
             |                           
            
                75.50
             | 
            
                75.90
             |                     
            
                13.75
             |                                 
            
                32,280
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2016
             | 
            
                0.00 / 0.00%
             |             
            
                76.00
             |           
            
                76.00
             |               
            
                75.00
             |                           
            
                76.00
             | 
            
                75.83
             |                     
            
                13.84
             |                                 
            
                19,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2016
             | 
            
                -2.00 / -2.56%
             |             
            
                77.50
             |           
            
                78.00
             |               
            
                76.00
             |                           
            
                76.00
             | 
            
                76.97
             |                     
            
                13.84
             |                                 
            
                35,350
             |            
            
                 
             |                                       
         
    
        
            | 
                1/8/2016
             | 
            
                +0.50 / +0.65%
             |             
            
                77.00
             |           
            
                78.50
             |               
            
                77.00
             |                           
            
                78.00
             | 
            
                77.54
             |                     
            
                14.21
             |                                 
            
                13,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/7/2016
             | 
            
                -1.00 / -1.27%
             |             
            
                78.00
             |           
            
                79.00
             |               
            
                76.50
             |                           
            
                77.50
             | 
            
                77.59
             |                     
            
                14.12
             |                                 
            
                97,940
             |            
            
                 
             |                                       
         
    
        
            | 
                1/6/2016
             | 
            
                +0.50 / +0.64%
             |             
            
                78.00
             |           
            
                78.50
             |               
            
                77.00
             |                           
            
                78.50
             | 
            
                78.01
             |                     
            
                14.30
             |                                 
            
                41,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/5/2016
             | 
            
                -0.50 / -0.64%
             |             
            
                77.50
             |           
            
                78.50
             |               
            
                77.50
             |                           
            
                78.00
             | 
            
                78.07
             |                     
            
                14.21
             |                                 
            
                42,490
             |            
            
                 
             |                                       
         
    
        
            | 
                1/4/2016
             | 
            
                0.00 / 0.00%
             |             
            
                78.50
             |           
            
                79.50
             |               
            
                78.00
             |                           
            
                78.50
             | 
            
                78.46
             |                     
            
                14.30
             |                                 
            
                49,010
             |  
            
                 
             |                                                              
             
    
         
    
    
 |