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            | 
                    Closing price on 4/17/2013
                 |  |  
    
        |           
                
                    | Open | 4.50 |  
                    | High | 4.50 |  
                    | Low | 4.30 |  
                    | Volume | 375,380 |  
                    | Split-adjusted Price | 1.54 |  
                
             | 
 |  PVT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/17/2013 | -0.10 / -2.27% | 4.50 | 4.50 | 4.30 | 4.30 | 4.30 | 1.54 | 375,380 |   |  
            | 4/16/2013 | -0.10 / -2.22% | 4.40 | 4.50 | 4.30 | 4.40 | 4.40 | 1.57 | 388,240 |   |  			
            | 4/15/2013 | -0.10 / -2.17% | 4.50 | 4.50 | 4.40 | 4.50 | 4.50 | 1.61 | 483,400 |   |  
            | 4/12/2013 | -0.10 / -2.13% | 4.70 | 4.70 | 4.50 | 4.60 | 4.60 | 1.64 | 234,040 |   |  			
            | 4/11/2013 | +0.10 / +2.17% | 4.70 | 4.70 | 4.60 | 4.70 | 4.70 | 1.68 | 328,710 |   |  
            | 4/10/2013 | 0.00 / 0.00% | 4.60 | 4.90 | 4.60 | 4.60 | 4.60 | 1.64 | 1,664,480 |   |  			
            | 4/9/2013 | -0.10 / -2.13% | 4.70 | 4.70 | 4.60 | 4.60 | 4.60 | 1.64 | 330,860 |   |  
            | 4/8/2013 | +0.10 / +2.17% | 4.60 | 4.70 | 4.50 | 4.70 | 4.70 | 1.68 | 460,840 |   |  			
            | 4/5/2013 | 0.00 / 0.00% | 4.60 | 4.60 | 4.40 | 4.60 | 4.60 | 1.64 | 323,150 |   |  
            | 4/4/2013 | -0.10 / -2.13% | 4.70 | 4.70 | 4.50 | 4.60 | 4.60 | 1.64 | 368,800 |   |  			
            | 4/3/2013 | +0.10 / +2.17% | 4.60 | 4.80 | 4.60 | 4.70 | 4.70 | 1.68 | 543,960 |   |  
            | 4/2/2013 | 0.00 / 0.00% | 4.70 | 4.80 | 4.50 | 4.60 | 4.60 | 1.64 | 1,141,690 |   |  			
            | 4/1/2013 | +0.20 / +4.55% | 4.40 | 4.60 | 4.30 | 4.60 | 4.60 | 1.64 | 444,180 |   |  
            | 3/29/2013 | 0.00 / 0.00% | 4.30 | 4.50 | 4.20 | 4.40 | 4.40 | 1.57 | 223,640 |   |  			
            | 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 |   |  |