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            | 
                    Closing price on 3/24/2016
                 |  |  
    
        |           
                
                    | Open | 93.00 |  
                    | High | 93.00 |  
                    | Low | 91.00 |  
                    | Volume | 26,420 |  
                    | Split-adjusted Price | 19.43 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 3/9/2016 | -1.50 / -1.88% | 78.50 | 81.00 | 78.50 | 78.50 | 78.86 | 16.76 | 16,700 |   |  			
            | 3/8/2016 | 0.00 / 0.00% | 78.00 | 81.50 | 78.00 | 80.00 | 79.26 | 17.08 | 20,540 |   |  
            | 3/7/2016 | +1.50 / +1.91% | 80.00 | 82.50 | 79.00 | 80.00 | 80.38 | 17.08 | 48,410 |   |  			
            | 3/4/2016 | +3.00 / +3.97% | 75.50 | 80.00 | 75.50 | 78.50 | 78.37 | 16.76 | 48,690 |   |  
            | 3/3/2016 | -1.00 / -1.31% | 77.50 | 77.50 | 75.50 | 75.50 | 76.04 | 16.12 | 25,520 |   |  			
            | 3/2/2016 | +2.00 / +2.68% | 74.00 | 77.50 | 74.00 | 76.50 | 76.01 | 16.33 | 60,270 |   |  
            | 3/1/2016 | -0.50 / -0.67% | 75.00 | 76.00 | 74.00 | 74.50 | 74.55 | 15.91 | 55,160 |   |  			
            | 2/29/2016 | +1.50 / +2.04% | 74.50 | 75.00 | 74.00 | 75.00 | 74.45 | 16.01 | 19,370 |   |  
            | 2/26/2016 | +0.50 / +0.68% | 72.50 | 74.00 | 72.50 | 73.50 | 73.37 | 15.69 | 32,780 |   |  			
            | 2/25/2016 | -3.00 / -3.95% | 77.00 | 77.00 | 72.50 | 73.00 | 73.63 | 15.59 | 98,600 |   |  
            | 2/24/2016 | +3.00 / +4.11% | 74.50 | 76.00 | 73.50 | 76.00 | 74.39 | 16.23 | 32,290 |   |  			
            | 2/23/2016 | -11.00 / -13.10% | 72.00 | 76.50 | 72.00 | 73.00 | 73.91 | 15.59 | 63,430 |   |  
            | 2/22/2016 | +0.50 / +0.60% | 82.50 | 84.00 | 82.00 | 84.00 | 82.89 | 15.30 | 158,380 |   |  			
            | 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 |   |  |