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            | 
                    Closing price on 1/15/2013
                 |  |  
    
        |           
                
                    | Open | 4.50 |  
                    | High | 4.70 |  
                    | Low | 4.40 |  
                    | Volume | 2,566,120 |  
                    | Split-adjusted Price | 1.68 |  
                
             | 
 |  PVT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 1/15/2013 | +0.30 / +6.82% | 4.50 | 4.70 | 4.40 | 4.70 | 4.70 | 1.68 | 2,566,120 |   |  
            | 1/14/2013 | -0.10 / -2.22% | 4.50 | 4.60 | 4.40 | 4.40 | 4.40 | 1.57 | 420,310 |   |  			
            | 1/11/2013 | -0.10 / -2.17% | 4.60 | 4.60 | 4.50 | 4.50 | 4.50 | 1.61 | 477,890 |   |  
            | 1/10/2013 | +0.20 / +4.55% | 4.30 | 4.60 | 4.30 | 4.60 | 4.60 | 1.64 | 465,460 |   |  			
            | 1/9/2013 | -0.10 / -2.22% | 4.50 | 4.70 | 4.40 | 4.40 | 4.40 | 1.57 | 1,338,960 |   |  
            | 1/8/2013 | 0.00 / 0.00% | 4.40 | 4.60 | 4.40 | 4.50 | 4.50 | 1.61 | 983,780 |   |  			
            | 1/7/2013 | -0.10 / -2.17% | 4.60 | 4.80 | 4.50 | 4.50 | 4.50 | 1.61 | 660,360 |   |  
            | 1/4/2013 | +0.10 / +2.22% | 4.50 | 4.70 | 4.40 | 4.60 | 4.60 | 1.64 | 1,277,170 |   |  			
            | 1/3/2013 | +0.20 / +4.65% | 4.50 | 4.50 | 4.40 | 4.50 | 4.50 | 1.61 | 1,949,080 |   |  
            | 1/2/2013 | +0.20 / +4.88% | 4.30 | 4.30 | 4.30 | 4.30 | 4.30 | 1.54 | 280,050 |   |  			
            | 12/28/2012 | 0.00 / 0.00% | 4.00 | 4.10 | 4.00 | 4.10 | 4.10 | 1.47 | 445,720 |   |  
            | 12/27/2012 | +0.10 / +2.50% | 4.00 | 4.10 | 3.90 | 4.10 | 4.10 | 1.47 | 389,810 |   |  			
            | 12/26/2012 | +0.10 / +2.56% | 3.90 | 4.00 | 3.90 | 4.00 | 4.00 | 1.43 | 364,630 |   |  
            | 12/25/2012 | -0.10 / -2.50% | 4.00 | 4.00 | 3.90 | 3.90 | 3.90 | 1.39 | 264,470 |   |  			
            | 12/24/2012 | 0.00 / 0.00% | 3.90 | 4.10 | 3.90 | 4.00 | 4.00 | 1.43 | 114,330 |   |  
            | 12/21/2012 | +0.10 / +2.56% | 3.90 | 4.00 | 3.90 | 4.00 | 4.00 | 1.43 | 192,030 |   |  			
            | 12/20/2012 | -0.10 / -2.50% | 4.10 | 4.10 | 3.90 | 3.90 | 3.90 | 1.39 | 127,020 |   |  
            | 12/19/2012 | +0.10 / +2.56% | 4.00 | 4.00 | 3.90 | 4.00 | 4.00 | 1.43 | 272,290 |   |  			
            | 12/18/2012 | -0.10 / -2.50% | 4.10 | 4.10 | 3.80 | 3.90 | 3.90 | 1.39 | 243,360 |   |  
            | 12/17/2012 | 0.00 / 0.00% | 4.10 | 4.10 | 3.90 | 4.00 | 4.00 | 1.43 | 210,410 |   |  			
            | 12/14/2012 | 0.00 / 0.00% | 4.00 | 4.10 | 4.00 | 4.00 | 4.00 | 1.43 | 328,970 |   |  
            | 12/13/2012 | -0.20 / -4.76% | 4.20 | 4.20 | 4.00 | 4.00 | 4.00 | 1.43 | 530,580 |   |  			
            | 12/12/2012 | +0.20 / +5.00% | 4.00 | 4.20 | 3.90 | 4.20 | 4.20 | 1.50 | 212,000 |   |  
            | 12/11/2012 | +0.10 / +2.56% | 4.00 | 4.00 | 3.90 | 4.00 | 4.00 | 1.43 | 812,540 |   |  			
            | 12/10/2012 | +0.10 / +2.63% | 3.80 | 3.90 | 3.80 | 3.90 | 3.90 | 1.39 | 605,890 |   |  
            | 12/7/2012 | 0.00 / 0.00% | 3.80 | 3.90 | 3.80 | 3.80 | 3.80 | 1.36 | 116,250 |   |  			
            | 12/6/2012 | 0.00 / 0.00% | 3.80 | 3.90 | 3.80 | 3.80 | 3.80 | 1.36 | 167,410 |   |  
            | 12/5/2012 | +0.10 / +2.70% | 3.80 | 3.80 | 3.70 | 3.80 | 3.80 | 1.36 | 393,040 |   |  			
            | 12/4/2012 | 0.00 / 0.00% | 3.70 | 3.80 | 3.70 | 3.70 | 3.70 | 1.32 | 126,330 |   |  
            | 12/3/2012 | 0.00 / 0.00% | 3.80 | 3.80 | 3.70 | 3.70 | 3.70 | 1.32 | 22,950 |   |  |