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            | 
                    Closing price on 4/21/2016
                 |  |  
    
        |           
                
                    | Open | 104.00 |  
                    | High | 104.00 |  
                    | Low | 103.00 |  
                    | Volume | 17,670 |  
                    | Split-adjusted Price | 22.20 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/21/2016 | 0.00 / 0.00% | 104.00 | 104.00 | 103.00 | 104.00 | 103.85 | 22.20 | 17,670 |   |  
            | 4/20/2016 | -2.00 / -1.89% | 106.00 | 107.00 | 104.00 | 104.00 | 105.22 | 22.20 | 39,490 |   |  			
            | 4/19/2016 | +3.00 / +2.91% | 107.00 | 108.00 | 106.00 | 106.00 | 107.08 | 22.63 | 50,170 |   |  
            | 4/15/2016 | -1.00 / -0.96% | 104.00 | 105.00 | 99.00 | 103.00 | 102.42 | 21.99 | 24,830 |   |  			
            | 4/14/2016 | +2.00 / +1.96% | 103.00 | 104.00 | 100.00 | 104.00 | 102.18 | 22.20 | 20,210 |   |  
            | 4/13/2016 | -2.00 / -1.92% | 104.00 | 104.00 | 101.00 | 102.00 | 102.31 | 21.78 | 35,020 |   |  			
            | 4/12/2016 | 0.00 / 0.00% | 104.00 | 105.00 | 103.00 | 104.00 | 103.80 | 22.20 | 14,750 |   |  
            | 4/11/2016 | +2.00 / +1.96% | 103.00 | 104.00 | 103.00 | 104.00 | 103.88 | 22.20 | 43,780 |   |  			
            | 4/8/2016 | +4.00 / +4.08% | 98.00 | 103.00 | 97.50 | 102.00 | 100.71 | 21.78 | 64,640 |   |  
            | 4/7/2016 | +2.50 / +2.62% | 96.00 | 98.00 | 95.50 | 98.00 | 97.34 | 20.92 | 37,990 |   |  			
            | 4/6/2016 | -0.50 / -0.52% | 96.00 | 96.00 | 95.00 | 95.50 | 95.21 | 20.39 | 65,110 |   |  
            | 4/5/2016 | 0.00 / 0.00% | 95.50 | 97.00 | 95.00 | 96.00 | 95.46 | 20.50 | 22,030 |   |  			
            | 4/4/2016 | +0.50 / +0.52% | 95.50 | 98.50 | 95.50 | 96.00 | 97.16 | 20.50 | 17,270 |   |  
            | 4/1/2016 | -0.50 / -0.52% | 95.00 | 96.50 | 94.50 | 95.50 | 95.29 | 20.39 | 63,250 |   |  			
            | 3/31/2016 | -4.00 / -4.00% | 100.00 | 100.00 | 96.00 | 96.00 | 97.66 | 20.50 | 81,700 |   |  
            | 3/30/2016 | +2.00 / +2.04% | 98.00 | 101.00 | 98.00 | 100.00 | 99.78 | 21.35 | 36,770 |   |  			
            | 3/29/2016 | +2.00 / +2.08% | 97.50 | 101.00 | 97.50 | 98.00 | 99.21 | 20.92 | 71,730 |   |  
            | 3/28/2016 | +4.00 / +4.35% | 93.00 | 97.50 | 93.00 | 96.00 | 95.42 | 20.50 | 71,970 |   |  			
            | 3/25/2016 | +1.00 / +1.10% | 91.00 | 92.00 | 90.50 | 92.00 | 90.99 | 19.64 | 28,870 |   |  
            | 3/24/2016 | -1.00 / -1.09% | 93.00 | 93.00 | 91.00 | 91.00 | 91.22 | 19.43 | 26,420 |   |  			
            | 3/23/2016 | +2.50 / +2.79% | 89.50 | 92.50 | 89.50 | 92.00 | 90.74 | 19.64 | 29,800 |   |  
            | 3/22/2016 | 0.00 / 0.00% | 89.00 | 89.50 | 87.00 | 89.50 | 88.10 | 19.11 | 42,020 |   |  			
            | 3/21/2016 | -0.50 / -0.56% | 90.50 | 92.00 | 88.50 | 89.50 | 90.49 | 19.11 | 25,330 |   |  
            | 3/18/2016 | +4.00 / +4.65% | 86.00 | 92.00 | 84.50 | 90.00 | 87.84 | 19.22 | 23,940 |   |  			
            | 3/17/2016 | +4.00 / +4.88% | 82.00 | 87.00 | 82.00 | 86.00 | 84.25 | 18.36 | 58,030 |   |  
            | 3/16/2016 | +0.50 / +0.61% | 81.50 | 83.00 | 81.50 | 82.00 | 82.21 | 17.51 | 11,920 |   |  			
            | 3/15/2016 | +1.00 / +1.24% | 80.50 | 82.00 | 80.00 | 81.50 | 80.79 | 17.40 | 22,910 |   |  
            | 3/14/2016 | -0.50 / -0.62% | 81.00 | 82.00 | 80.50 | 80.50 | 80.88 | 17.19 | 31,380 |   |  			
            | 3/11/2016 | -0.50 / -0.61% | 82.00 | 83.50 | 81.00 | 81.00 | 82.32 | 17.29 | 14,200 |   |  
            | 3/10/2016 | +3.00 / +3.82% | 79.00 | 82.00 | 79.00 | 81.50 | 81.22 | 17.40 | 30,170 |   |  |