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                    Closing price on 7/18/2018
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        |           
                
                    | Open | 61.90 |  
                    | High | 63.30 |  
                    | Low | 60.00 |  
                    | Volume | 38,370 |  
                    | Split-adjusted Price | 33.80 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  			
            | 6/20/2018 | 0.00 / 0.00% | 91.50 | 93.00 | 90.00 | 92.00 | 91.84 | 32.39 | 32,960 |   |  
            | 6/19/2018 | -5.40 / -5.54% | 95.00 | 97.00 | 92.00 | 92.00 | 93.62 | 32.39 | 18,350 |   |  			
            | 6/18/2018 | -0.70 / -0.71% | 98.20 | 98.20 | 93.50 | 97.40 | 95.68 | 34.29 | 66,420 |   |  
            | 6/15/2018 | -0.60 / -0.61% | 98.10 | 98.10 | 97.70 | 98.10 | 98.03 | 34.54 | 17,250 |   |  			
            | 6/14/2018 | 0.00 / 0.00% | 99.00 | 99.80 | 97.20 | 98.70 | 98.54 | 34.75 | 37,090 |   |  
            | 6/13/2018 | +0.20 / +0.20% | 99.90 | 99.90 | 98.70 | 98.70 | 98.85 | 34.75 | 15,710 |   |  			
            | 6/12/2018 | -1.50 / -1.50% | 101.00 | 101.00 | 97.00 | 98.50 | 98.33 | 34.68 | 48,600 |   |  
            | 6/11/2018 | 0.00 / 0.00% | 99.00 | 100.00 | 98.00 | 100.00 | 98.93 | 35.21 | 36,430 |   |  			
            | 6/8/2018 | -0.90 / -0.89% | 99.00 | 101.00 | 99.00 | 100.00 | 99.91 | 35.21 | 10,550 |   |  
            | 6/7/2018 | +2.40 / +2.44% | 99.00 | 101.00 | 98.50 | 100.90 | 100.00 | 35.52 | 39,430 |   |  |