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                    Closing price on 8/1/2018
                 |  |  
    
        |           
                
                    | Open | 60.60 |  
                    | High | 62.00 |  
                    | Low | 58.80 |  
                    | Volume | 26,390 |  
                    | Split-adjusted Price | 31.51 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 8/1/2018 | -1.60 / -2.64% | 60.60 | 62.00 | 58.80 | 59.00 | 59.87 | 31.51 | 26,390 |   |  
            | 7/31/2018 | -1.40 / -2.26% | 63.00 | 63.00 | 58.60 | 60.60 | 61.00 | 32.36 | 33,490 |   |  			
            | 7/30/2018 | +0.20 / +0.32% | 62.50 | 62.50 | 61.60 | 62.00 | 61.81 | 33.11 | 32,600 |   |  
            | 7/27/2018 | -0.30 / -0.48% | 61.50 | 62.60 | 61.50 | 61.80 | 61.91 | 33.00 | 28,120 |   |  			
            | 7/26/2018 | -0.70 / -1.11% | 61.10 | 63.00 | 61.10 | 62.10 | 62.19 | 33.16 | 29,170 |   |  
            | 7/25/2018 | +0.10 / +0.16% | 62.70 | 63.40 | 62.70 | 62.80 | 62.87 | 33.54 | 62,260 |   |  			
            | 7/24/2018 | -0.60 / -0.95% | 63.00 | 63.10 | 61.00 | 62.70 | 62.18 | 33.48 | 30,990 |   |  
            | 7/23/2018 | -0.70 / -1.09% | 65.00 | 65.50 | 63.20 | 63.30 | 63.58 | 33.80 | 84,030 |   |  			
            | 7/20/2018 | -2.70 / -4.05% | 62.20 | 66.00 | 62.20 | 64.00 | 63.64 | 34.18 | 163,670 |   |  
            | 7/19/2018 | +3.40 / +5.37% | 67.70 | 67.70 | 66.00 | 66.70 | 66.96 | 35.62 | 102,290 |   |  			
            | 7/18/2018 | +3.90 / +6.57% | 61.90 | 63.30 | 60.00 | 63.30 | 62.73 | 33.80 | 38,370 |   |  
            | 7/17/2018 | +3.80 / +6.83% | 56.60 | 59.40 | 55.60 | 59.40 | 58.71 | 31.72 | 88,260 |   |  			
            | 7/16/2018 | +0.20 / +0.36% | 55.40 | 55.60 | 55.20 | 55.60 | 55.43 | 29.69 | 29,390 |   |  
            | 7/13/2018 | 0.00 / 0.00% | 55.40 | 55.50 | 55.30 | 55.40 | 55.38 | 29.58 | 37,540 |   |  			
            | 7/12/2018 | +0.50 / +0.91% | 54.50 | 55.50 | 54.50 | 55.40 | 55.25 | 29.58 | 31,620 |   |  
            | 7/11/2018 | -0.50 / -0.90% | 54.30 | 55.30 | 54.30 | 54.90 | 54.74 | 29.32 | 72,400 |   |  			
            | 7/10/2018 | 0.00 / 0.00% | 55.40 | 55.50 | 54.80 | 55.40 | 55.24 | 29.58 | 16,890 |   |  
            | 7/9/2018 | +0.50 / +0.91% | 54.90 | 55.50 | 54.30 | 55.40 | 54.98 | 29.58 | 187,290 |   |  			
            | 7/6/2018 | +0.10 / +0.18% | 54.80 | 55.20 | 54.00 | 54.90 | 54.55 | 29.32 | 140,850 |   |  
            | 7/5/2018 | -0.20 / -0.36% | 55.00 | 55.70 | 54.50 | 54.80 | 55.01 | 29.26 | 134,220 |   |  			
            | 7/4/2018 | -0.90 / -1.61% | 55.00 | 55.80 | 54.10 | 55.00 | 54.41 | 29.37 | 72,510 |   |  
            | 7/3/2018 | 0.00 / 0.00% | 55.50 | 56.00 | 54.10 | 55.90 | 55.33 | 29.85 | 49,590 |   |  			
            | 7/2/2018 | -0.10 / -0.18% | 56.00 | 56.00 | 53.50 | 55.90 | 54.67 | 29.85 | 104,130 |   |  
            | 6/29/2018 | +0.10 / +0.18% | 55.50 | 57.00 | 53.00 | 56.00 | 54.78 | 29.90 | 40,360 |   |  			
            | 6/28/2018 | -2.10 / -3.62% | 59.00 | 59.00 | 54.00 | 55.90 | 55.02 | 29.85 | 165,220 |   |  
            | 6/27/2018 | -32.00 / -35.56% | 59.40 | 61.90 | 58.00 | 58.00 | 59.30 | 30.97 | 44,470 |   |  			
            | 6/26/2018 | -2.50 / -2.70% | 93.50 | 93.50 | 90.00 | 90.00 | 90.95 | 31.68 | 80,650 |   |  
            | 6/25/2018 | +2.50 / +2.78% | 91.10 | 93.00 | 90.00 | 92.50 | 91.25 | 32.56 | 171,720 |   |  			
            | 6/22/2018 | 0.00 / 0.00% | 90.00 | 90.50 | 89.40 | 90.00 | 89.86 | 31.68 | 36,570 |   |  
            | 6/21/2018 | -2.00 / -2.17% | 92.10 | 93.00 | 89.10 | 90.00 | 90.84 | 31.68 | 59,960 |   |  |