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            | 
                    Closing price on 3/28/2013
                 |  |  
    
        |           
                
                    | Open | 4.50 |  
                    | High | 4.50 |  
                    | Low | 4.30 |  
                    | Volume | 370,010 |  
                    | Split-adjusted Price | 1.57 |  
                
             | 
 |  PVT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/28/2013 | -0.10 / -2.22% | 4.50 | 4.50 | 4.30 | 4.40 | 4.40 | 1.57 | 370,010 |   |  
            | 3/27/2013 | -0.10 / -2.17% | 4.60 | 4.60 | 4.40 | 4.50 | 4.50 | 1.61 | 231,230 |   |  			
            | 3/26/2013 | 0.00 / 0.00% | 4.60 | 4.70 | 4.50 | 4.60 | 4.60 | 1.64 | 125,970 |   |  
            | 3/25/2013 | +0.10 / +2.22% | 4.50 | 4.60 | 4.50 | 4.60 | 4.60 | 1.64 | 238,440 |   |  			
            | 3/22/2013 | -0.10 / -2.17% | 4.60 | 4.70 | 4.50 | 4.50 | 4.50 | 1.61 | 497,530 |   |  
            | 3/21/2013 | -0.10 / -2.13% | 4.70 | 4.70 | 4.60 | 4.60 | 4.60 | 1.64 | 289,850 |   |  			
            | 3/20/2013 | +0.10 / +2.17% | 4.60 | 4.80 | 4.60 | 4.70 | 4.70 | 1.68 | 267,570 |   |  
            | 3/19/2013 | -0.10 / -2.13% | 4.60 | 4.70 | 4.60 | 4.60 | 4.60 | 1.64 | 148,960 |   |  			
            | 3/18/2013 | 0.00 / 0.00% | 4.70 | 4.80 | 4.60 | 4.70 | 4.70 | 1.68 | 661,320 |   |  
            | 3/15/2013 | 0.00 / 0.00% | 4.70 | 4.80 | 4.60 | 4.70 | 4.70 | 1.68 | 190,340 |   |  			
            | 3/14/2013 | 0.00 / 0.00% | 4.70 | 4.80 | 4.60 | 4.70 | 4.70 | 1.68 | 626,670 |   |  
            | 3/13/2013 | 0.00 / 0.00% | 4.70 | 4.80 | 4.60 | 4.70 | 4.70 | 1.68 | 682,620 |   |  			
            | 3/12/2013 | -0.10 / -2.08% | 4.70 | 4.90 | 4.60 | 4.70 | 4.70 | 1.68 | 510,220 |   |  
            | 3/11/2013 | +0.20 / +4.35% | 4.70 | 4.90 | 4.60 | 4.80 | 4.80 | 1.72 | 552,260 |   |  			
            | 3/8/2013 | +0.10 / +2.22% | 4.50 | 4.70 | 4.50 | 4.60 | 4.60 | 1.64 | 240,700 |   |  
            | 3/7/2013 | -0.20 / -4.26% | 4.70 | 4.70 | 4.40 | 4.50 | 4.50 | 1.61 | 823,300 |   |  			
            | 3/6/2013 | +0.20 / +4.44% | 4.60 | 4.70 | 4.50 | 4.70 | 4.70 | 1.68 | 612,120 |   |  
            | 3/5/2013 | -0.20 / -4.26% | 4.60 | 4.70 | 4.40 | 4.50 | 4.50 | 1.61 | 572,340 |   |  			
            | 3/4/2013 | -0.30 / -6.00% | 5.00 | 5.00 | 4.70 | 4.70 | 4.70 | 1.68 | 1,072,260 |   |  
            | 3/1/2013 | +0.20 / +4.17% | 4.80 | 5.10 | 4.70 | 5.00 | 5.00 | 1.79 | 2,881,490 |   |  			
            | 2/28/2013 | +0.10 / +2.13% | 4.80 | 4.90 | 4.70 | 4.80 | 4.80 | 1.72 | 765,690 |   |  
            | 2/27/2013 | 0.00 / 0.00% | 4.70 | 4.80 | 4.60 | 4.70 | 4.70 | 1.68 | 717,680 |   |  			
            | 2/26/2013 | -0.20 / -4.08% | 4.90 | 5.10 | 4.70 | 4.70 | 4.70 | 1.68 | 1,322,000 |   |  
            | 2/25/2013 | -0.10 / -2.00% | 5.00 | 5.10 | 4.90 | 4.90 | 4.90 | 1.75 | 398,990 |   |  			
            | 2/22/2013 | -0.10 / -1.96% | 5.10 | 5.30 | 4.80 | 5.00 | 5.00 | 1.79 | 1,378,720 |   |  
            | 2/21/2013 | -0.30 / -5.56% | 5.40 | 5.50 | 5.10 | 5.10 | 5.10 | 1.82 | 1,960,590 |   |  			
            | 2/20/2013 | +0.10 / +1.89% | 5.20 | 5.50 | 5.10 | 5.40 | 5.40 | 1.93 | 856,400 |   |  
            | 2/19/2013 | -0.20 / -3.64% | 5.40 | 5.50 | 5.20 | 5.30 | 5.30 | 1.89 | 2,172,530 |   |  			
            | 2/18/2013 | +0.20 / +3.77% | 5.50 | 5.60 | 5.20 | 5.50 | 5.50 | 1.97 | 1,439,310 |   |  
            | 2/8/2013 | +0.30 / +6.00% | 5.20 | 5.30 | 5.10 | 5.30 | 5.30 | 1.89 | 1,985,370 |   |  |