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                    Closing price on 10/4/2013
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                    | Open | 8.90 |  
                    | High | 9.20 |  
                    | Low | 8.90 |  
                    | Volume | 1,750,100 |  
                    | Split-adjusted Price | 3.25 |  
                
             | 
 |  PVT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 10/4/2013 | +0.10 / +1.11% | 8.90 | 9.20 | 8.90 | 9.10 | 9.10 | 3.25 | 1,750,100 |   |  
            | 10/3/2013 | -0.20 / -2.17% | 9.10 | 9.20 | 8.80 | 9.00 | 9.00 | 3.22 | 2,537,910 |   |  			
            | 10/2/2013 | 0.00 / 0.00% | 9.30 | 9.40 | 9.10 | 9.20 | 9.20 | 3.29 | 2,477,640 |   |  
            | 10/1/2013 | +0.20 / +2.22% | 9.30 | 9.60 | 9.00 | 9.20 | 9.20 | 3.29 | 4,483,690 |   |  			
            | 9/30/2013 | +0.50 / +5.88% | 8.50 | 9.00 | 8.40 | 9.00 | 9.00 | 3.22 | 3,222,490 |   |  
            | 9/27/2013 | 0.00 / 0.00% | 8.60 | 8.80 | 8.40 | 8.50 | 8.50 | 3.04 | 2,218,270 |   |  			
            | 9/26/2013 | +0.20 / +2.41% | 8.30 | 8.60 | 8.20 | 8.50 | 8.50 | 3.04 | 2,828,770 |   |  
            | 9/25/2013 | -0.40 / -4.60% | 8.70 | 9.00 | 8.20 | 8.30 | 8.30 | 2.97 | 3,804,690 |   |  			
            | 9/24/2013 | +0.50 / +6.10% | 8.20 | 8.70 | 8.20 | 8.70 | 8.70 | 3.11 | 3,749,990 |   |  
            | 9/23/2013 | +0.50 / +6.49% | 7.70 | 8.20 | 7.60 | 8.20 | 8.20 | 2.93 | 3,727,190 |   |  			
            | 9/20/2013 | +0.20 / +2.67% | 7.60 | 7.80 | 7.60 | 7.70 | 7.70 | 2.75 | 1,888,520 |   |  
            | 9/19/2013 | +0.10 / +1.35% | 7.50 | 7.70 | 7.40 | 7.50 | 7.50 | 2.68 | 2,502,480 |   |  			
            | 9/18/2013 | -0.20 / -2.63% | 7.60 | 7.70 | 7.30 | 7.40 | 7.40 | 2.64 | 1,881,020 |   |  
            | 9/17/2013 | +0.10 / +1.33% | 7.50 | 7.70 | 7.30 | 7.60 | 7.60 | 2.72 | 2,546,270 |   |  			
            | 9/16/2013 | +0.30 / +4.17% | 7.30 | 7.60 | 7.30 | 7.50 | 7.50 | 2.68 | 3,410,040 |   |  
            | 9/13/2013 | +0.20 / +2.86% | 7.00 | 7.20 | 7.00 | 7.20 | 7.20 | 2.57 | 2,172,520 |   |  			
            | 9/12/2013 | +0.30 / +4.48% | 6.70 | 7.00 | 6.60 | 7.00 | 7.00 | 2.50 | 1,836,300 |   |  
            | 9/11/2013 | 0.00 / 0.00% | 6.80 | 6.90 | 6.60 | 6.70 | 6.70 | 2.39 | 1,553,830 |   |  			
            | 9/10/2013 | +0.10 / +1.52% | 6.50 | 6.80 | 6.50 | 6.70 | 6.70 | 2.39 | 1,843,530 |   |  
            | 9/9/2013 | -0.40 / -5.71% | 6.80 | 6.90 | 6.60 | 6.60 | 6.60 | 2.36 | 3,598,120 |   |  			
            | 9/6/2013 | +0.10 / +1.45% | 7.00 | 7.30 | 6.90 | 7.00 | 7.00 | 2.50 | 2,326,870 |   |  
            | 9/5/2013 | +0.40 / +6.15% | 6.60 | 6.90 | 6.50 | 6.90 | 6.90 | 2.47 | 5,641,830 |   |  			
            | 9/4/2013 | 0.00 / 0.00% | 6.40 | 6.60 | 6.30 | 6.50 | 6.50 | 2.32 | 1,755,360 |   |  
            | 9/3/2013 | 0.00 / 0.00% | 6.60 | 6.70 | 6.40 | 6.50 | 6.50 | 2.32 | 1,239,700 |   |  			
            | 8/30/2013 | +0.20 / +3.17% | 6.30 | 6.60 | 6.30 | 6.50 | 6.50 | 2.32 | 1,324,630 |   |  
            | 8/29/2013 | 0.00 / 0.00% | 6.40 | 6.60 | 6.30 | 6.30 | 6.30 | 2.25 | 1,216,010 |   |  			
            | 8/28/2013 | -0.30 / -4.55% | 6.50 | 6.60 | 6.30 | 6.30 | 6.30 | 2.25 | 2,460,300 |   |  
            | 8/27/2013 | -0.20 / -2.94% | 6.70 | 6.80 | 6.60 | 6.60 | 6.60 | 2.36 | 945,460 |   |  			
            | 8/26/2013 | +0.20 / +3.03% | 6.60 | 6.80 | 6.40 | 6.80 | 6.80 | 2.43 | 1,761,210 |   |  
            | 8/23/2013 | +0.10 / +1.54% | 6.60 | 6.70 | 6.40 | 6.60 | 6.60 | 2.36 | 2,479,700 |   |  |  |