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                    Closing price on 9/15/2015
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        |           
                
                    | Open | 49.60 |  
                    | High | 49.80 |  
                    | Low | 49.60 |  
                    | Volume | 8,400 |  
                    | Split-adjusted Price | 9.07 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 8/6/2015 | 0.00 / 0.00% | 50.50 | 51.00 | 50.50 | 51.00 | 50.55 | 9.29 | 3,620 |   |  			
            | 8/5/2015 | 0.00 / 0.00% | 51.00 | 51.00 | 50.50 | 51.00 | 50.56 | 9.29 | 8,920 |   |  
            | 8/4/2015 | +0.50 / +0.99% | 50.50 | 51.00 | 50.00 | 51.00 | 50.58 | 9.29 | 1,720 |   |  |