| 
    
        
            | 
                    Closing price on 7/22/2015
                 |  |  
    
        |           
                
                    | Open | 51.50 |  
                    | High | 53.00 |  
                    | Low | 51.50 |  
                    | Volume | 104,360 |  
                    | Split-adjusted Price | 9.38 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 7/22/2015 | 0.00 / 0.00% | 51.50 | 53.00 | 51.50 | 51.50 | 51.93 | 9.38 | 104,360 |   |  
            | 7/21/2015 | +2.10 / +4.25% | 50.00 | 52.50 | 50.00 | 51.50 | 51.26 | 9.38 | 84,880 |   |  			
            | 7/20/2015 | +0.40 / +0.82% | 49.00 | 49.40 | 49.00 | 49.40 | 49.20 | 9.00 | 9,700 |   |  
            | 7/17/2015 | -0.40 / -0.81% | 49.40 | 49.40 | 48.80 | 49.00 | 49.12 | 8.93 | 38,840 |   |  			
            | 7/16/2015 | -0.40 / -0.80% | 49.00 | 49.40 | 49.00 | 49.40 | 49.06 | 9.00 | 19,630 |   |  
            | 7/15/2015 | +0.80 / +1.63% | 48.70 | 49.90 | 48.60 | 49.80 | 48.77 | 9.07 | 13,780 |   |  			
            | 7/14/2015 | 0.00 / 0.00% | 49.50 | 49.50 | 48.70 | 49.00 | 48.98 | 8.93 | 16,740 |   |  
            | 7/13/2015 | +0.70 / +1.45% | 48.20 | 49.00 | 48.20 | 49.00 | 48.61 | 8.93 | 22,650 |   |  			
            | 7/10/2015 | -0.40 / -0.82% | 48.60 | 48.60 | 48.20 | 48.30 | 48.34 | 8.80 | 5,070 |   |  
            | 7/9/2015 | -0.60 / -1.22% | 49.00 | 49.00 | 48.00 | 48.70 | 48.29 | 8.87 | 24,560 |   |  			
            | 7/8/2015 | +0.10 / +0.20% | 49.10 | 49.70 | 48.50 | 49.30 | 48.81 | 8.98 | 3,360 |   |  
            | 7/7/2015 | +0.10 / +0.20% | 49.40 | 49.40 | 49.20 | 49.20 | 49.36 | 8.96 | 2,350 |   |  			
            | 7/6/2015 | -0.70 / -1.41% | 49.80 | 50.50 | 49.10 | 49.10 | 49.75 | 8.94 | 3,430 |   |  
            | 7/3/2015 | 0.00 / 0.00% | 50.00 | 50.00 | 49.50 | 49.80 | 50.00 | 9.07 | 1,580 |   |  			
            | 7/2/2015 | +0.90 / +1.84% | 48.60 | 49.80 | 48.50 | 49.80 | 49.22 | 9.07 | 1,280 |   |  
            | 7/1/2015 | -1.00 / -2.00% | 48.30 | 49.00 | 48.30 | 48.90 | 48.51 | 8.91 | 11,420 |   |  			
            | 6/30/2015 | +0.20 / +0.40% | 49.10 | 50.00 | 48.00 | 49.90 | 48.49 | 9.09 | 25,780 |   |  
            | 6/29/2015 | +0.60 / +1.22% | 49.50 | 49.70 | 49.50 | 49.70 | 49.60 | 9.05 | 510 |   |  			
            | 6/26/2015 | -0.90 / -1.80% | 50.00 | 50.00 | 49.10 | 49.10 | 49.30 | 8.94 | 8,600 |   |  
            | 6/25/2015 | -0.50 / -0.99% | 50.00 | 50.50 | 49.60 | 50.00 | 49.85 | 9.11 | 3,230 |   |  			
            | 6/24/2015 | 0.00 / 0.00% | 50.00 | 50.50 | 50.00 | 50.50 | 50.25 | 9.20 | 236,660 |   |  
            | 6/23/2015 | +0.60 / +1.20% | 50.50 | 50.50 | 50.50 | 50.50 | 50.50 | 9.20 | 510 |   |  			
            | 6/22/2015 | -1.10 / -2.16% | 50.50 | 50.50 | 49.00 | 49.90 | 49.53 | 9.09 | 10,660 |   |  
            | 6/19/2015 | +0.50 / +0.99% | 50.50 | 51.00 | 50.50 | 51.00 | 50.75 | 9.29 | 820 |   |  			
            | 6/18/2015 | 0.00 / 0.00% | 50.50 | 50.50 | 50.00 | 50.50 | 50.38 | 9.20 | 930 |   |  
            | 6/17/2015 | -0.50 / -0.98% | 50.50 | 50.50 | 50.00 | 50.50 | 50.19 | 9.20 | 10,600 |   |  			
            | 6/16/2015 | +0.50 / +0.99% | 50.50 | 51.00 | 50.00 | 51.00 | 50.54 | 9.29 | 12,050 |   |  
            | 6/15/2015 | +0.80 / +1.61% | 50.00 | 50.50 | 50.00 | 50.50 | 50.00 | 9.20 | 4,000 |   |  			
            | 6/12/2015 | +0.20 / +0.40% | 49.60 | 50.00 | 49.00 | 49.70 | 49.62 | 9.05 | 12,280 |   |  
            | 6/11/2015 | 0.00 / 0.00% | 49.50 | 49.50 | 48.70 | 49.50 | 49.24 | 9.02 | 13,890 |   |  |