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            | 
                    Closing price on 3/24/2017
                 |  |  
    
        |           
                
                    | Open | 130.00 |  
                    | High | 131.70 |  
                    | Low | 129.00 |  
                    | Volume | 36,900 |  
                    | Split-adjusted Price | 33.38 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/24/2017 | +1.00 / +0.77% | 130.00 | 131.70 | 129.00 | 130.30 | 130.24 | 33.38 | 36,900 |   |  
            | 3/23/2017 | -3.90 / -2.93% | 133.20 | 133.20 | 129.00 | 129.30 | 130.53 | 33.13 | 153,160 |   |  			
            | 3/22/2017 | -1.40 / -1.04% | 134.10 | 134.90 | 133.00 | 133.20 | 133.94 | 34.13 | 67,620 |   |  
            | 3/21/2017 | +0.20 / +0.15% | 134.20 | 138.00 | 134.00 | 134.60 | 135.25 | 34.49 | 47,490 |   |  			
            | 3/20/2017 | -6.80 / -4.82% | 131.40 | 138.00 | 131.40 | 134.40 | 134.19 | 34.43 | 370,120 |   |  
            | 3/17/2017 | -1.30 / -0.91% | 142.00 | 142.30 | 140.90 | 141.20 | 141.22 | 36.18 | 69,160 |   |  			
            | 3/16/2017 | 0.00 / 0.00% | 142.50 | 143.40 | 141.60 | 142.50 | 142.16 | 36.51 | 23,030 |   |  
            | 3/15/2017 | 0.00 / 0.00% | 143.00 | 143.50 | 141.00 | 142.50 | 142.05 | 36.51 | 72,820 |   |  			
            | 3/14/2017 | +4.50 / +3.26% | 138.00 | 142.50 | 137.80 | 142.50 | 140.41 | 36.51 | 211,040 |   |  
            | 3/13/2017 | -0.50 / -0.36% | 138.50 | 138.70 | 137.50 | 138.00 | 138.30 | 35.36 | 33,450 |   |  			
            | 3/10/2017 | -0.50 / -0.36% | 139.50 | 139.50 | 138.50 | 138.50 | 138.95 | 35.48 | 35,280 |   |  
            | 3/9/2017 | 0.00 / 0.00% | 138.10 | 139.00 | 138.10 | 139.00 | 138.24 | 35.61 | 8,840 |   |  			
            | 3/8/2017 | +2.00 / +1.46% | 137.00 | 139.80 | 136.60 | 139.00 | 139.11 | 35.61 | 52,110 |   |  
            | 3/7/2017 | -1.00 / -0.72% | 138.00 | 138.00 | 136.50 | 137.00 | 137.17 | 35.10 | 133,391 |   |  			
            | 3/6/2017 | -0.70 / -0.50% | 138.00 | 138.80 | 138.00 | 138.00 | 138.31 | 35.36 | 27,800 |   |  
            | 3/3/2017 | +0.20 / +0.14% | 138.60 | 139.00 | 136.10 | 138.70 | 137.80 | 35.54 | 9,100 |   |  			
            | 3/2/2017 | +0.10 / +0.07% | 139.00 | 139.20 | 138.00 | 138.50 | 138.80 | 35.48 | 33,300 |   |  
            | 3/1/2017 | +0.90 / +0.65% | 137.50 | 139.80 | 136.90 | 138.40 | 138.15 | 35.46 | 46,500 |   |  			
            | 2/28/2017 | +2.50 / +1.85% | 134.00 | 140.00 | 134.00 | 137.50 | 137.65 | 35.23 | 69,690 |   |  
            | 2/27/2017 | +4.00 / +3.05% | 131.00 | 135.00 | 131.00 | 135.00 | 132.59 | 34.59 | 33,570 |   |  			
            | 2/24/2017 | -2.80 / -2.09% | 131.50 | 135.50 | 131.00 | 131.00 | 132.50 | 33.56 | 93,950 |   |  
            | 2/23/2017 | -6.50 / -4.63% | 140.00 | 140.10 | 131.00 | 133.80 | 135.68 | 34.28 | 140,410 |   |  			
            | 2/22/2017 | +0.80 / +0.57% | 139.50 | 141.20 | 139.40 | 140.30 | 139.95 | 35.95 | 53,720 |   |  
            | 2/21/2017 | 0.00 / 0.00% | 140.90 | 141.50 | 139.00 | 139.50 | 140.00 | 35.74 | 99,350 |   |  			
            | 2/20/2017 | -0.50 / -0.36% | 140.50 | 141.90 | 139.50 | 139.50 | 140.83 | 35.74 | 43,620 |   |  
            | 2/17/2017 | +4.90 / +3.63% | 135.00 | 140.00 | 134.50 | 140.00 | 136.24 | 35.87 | 175,524 |   |  			
            | 2/16/2017 | -0.20 / -0.15% | 135.10 | 136.00 | 134.00 | 135.10 | 135.07 | 34.61 | 96,690 |   |  
            | 2/15/2017 | +0.70 / +0.52% | 135.00 | 136.00 | 134.60 | 135.30 | 135.40 | 34.66 | 74,740 |   |  			
            | 2/14/2017 | -0.60 / -0.44% | 136.00 | 136.00 | 134.60 | 134.60 | 135.16 | 34.49 | 32,220 |   |  
            | 2/13/2017 | +3.20 / +2.42% | 133.20 | 135.20 | 132.00 | 135.20 | 134.29 | 34.64 | 126,930 |   |  |