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            | 
                    Closing price on 6/1/2016
                 |  |  
    
        |           
                
                    | Open | 114.00 |  
                    | High | 116.00 |  
                    | Low | 114.00 |  
                    | Volume | 25,960 |  
                    | Split-adjusted Price | 24.55 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/1/2016 | 0.00 / 0.00% | 114.00 | 116.00 | 114.00 | 115.00 | 114.79 | 24.55 | 25,960 |   |  
            | 5/31/2016 | 0.00 / 0.00% | 114.00 | 115.00 | 113.00 | 115.00 | 114.59 | 24.55 | 28,590 |   |  			
            | 5/30/2016 | 0.00 / 0.00% | 113.00 | 115.00 | 113.00 | 115.00 | 114.21 | 24.55 | 11,610 |   |  
            | 5/27/2016 | 0.00 / 0.00% | 114.00 | 115.00 | 112.00 | 115.00 | 112.94 | 24.55 | 14,680 |   |  			
            | 5/26/2016 | 0.00 / 0.00% | 114.00 | 116.00 | 114.00 | 115.00 | 114.81 | 24.55 | 28,080 |   |  
            | 5/25/2016 | +2.00 / +1.77% | 113.00 | 115.00 | 112.00 | 115.00 | 114.43 | 24.55 | 25,850 |   |  			
            | 5/24/2016 | 0.00 / 0.00% | 113.00 | 114.00 | 112.00 | 113.00 | 112.85 | 24.13 | 14,470 |   |  
            | 5/23/2016 | 0.00 / 0.00% | 113.00 | 114.00 | 113.00 | 113.00 | 113.31 | 24.13 | 12,920 |   |  			
            | 5/20/2016 | -2.00 / -1.74% | 114.00 | 116.00 | 113.00 | 113.00 | 113.41 | 24.13 | 16,030 |   |  
            | 5/19/2016 | +3.00 / +2.68% | 111.00 | 115.00 | 111.00 | 115.00 | 113.16 | 24.55 | 79,420 |   |  			
            | 5/18/2016 | -5.00 / -4.27% | 117.00 | 118.00 | 112.00 | 112.00 | 114.21 | 23.91 | 96,290 |   |  
            | 5/17/2016 | -2.00 / -1.68% | 118.00 | 120.00 | 117.00 | 117.00 | 118.22 | 24.98 | 61,810 |   |  			
            | 5/16/2016 | -1.00 / -0.83% | 118.00 | 120.00 | 117.00 | 119.00 | 118.51 | 25.41 | 56,250 |   |  
            | 5/13/2016 | +1.00 / +0.84% | 119.00 | 120.00 | 117.00 | 120.00 | 117.72 | 25.62 | 49,940 |   |  			
            | 5/12/2016 | +1.00 / +0.85% | 118.00 | 120.00 | 118.00 | 119.00 | 118.98 | 25.41 | 34,770 |   |  
            | 5/11/2016 | +3.00 / +2.61% | 117.00 | 119.00 | 117.00 | 118.00 | 117.58 | 25.19 | 15,130 |   |  			
            | 5/10/2016 | -2.00 / -1.71% | 117.00 | 117.00 | 115.00 | 115.00 | 115.94 | 24.55 | 35,330 |   |  
            | 5/9/2016 | +1.00 / +0.86% | 115.00 | 117.00 | 115.00 | 117.00 | 116.29 | 24.98 | 13,750 |   |  			
            | 5/6/2016 | 0.00 / 0.00% | 116.00 | 117.00 | 115.00 | 116.00 | 116.00 | 24.77 | 11,500 |   |  
            | 5/5/2016 | -3.00 / -2.52% | 119.00 | 119.00 | 116.00 | 116.00 | 116.76 | 24.77 | 62,900 |   |  			
            | 5/4/2016 | +6.00 / +5.31% | 113.00 | 119.00 | 112.00 | 119.00 | 116.24 | 25.41 | 30,780 |   |  
            | 4/29/2016 | +1.00 / +0.89% | 113.00 | 113.00 | 112.00 | 113.00 | 112.04 | 24.13 | 18,270 |   |  			
            | 4/28/2016 | +2.00 / +1.82% | 111.00 | 113.00 | 110.00 | 112.00 | 110.79 | 23.91 | 57,530 |   |  
            | 4/27/2016 | 0.00 / 0.00% | 110.00 | 111.00 | 109.00 | 110.00 | 110.12 | 23.49 | 19,860 |   |  			
            | 4/26/2016 | +3.00 / +2.80% | 108.00 | 110.00 | 108.00 | 110.00 | 109.10 | 23.49 | 26,490 |   |  
            | 4/25/2016 | -2.00 / -1.83% | 110.00 | 111.00 | 107.00 | 107.00 | 108.04 | 22.85 | 20,510 |   |  			
            | 4/22/2016 | +5.00 / +4.81% | 104.00 | 109.00 | 103.00 | 109.00 | 106.94 | 23.27 | 41,800 |   |  
            | 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 |   |  |