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                    Closing price on 10/7/2015
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        |           
                
                    | Open | 56.50 |  
                    | High | 57.00 |  
                    | Low | 55.50 |  
                    | Volume | 35,250 |  
                    | Split-adjusted Price | 10.20 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 8/26/2015 | +0.20 / +0.41% | 49.40 | 49.40 | 48.50 | 48.50 | 48.96 | 8.83 | 8,640 |   |  |