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                    Closing price on 9/13/2012
                 |  |  
    
        |           
                
                    | Open | 12.50 |  
                    | High | 12.70 |  
                    | Low | 12.10 |  
                    | Volume | 100,217 |  
                    | Split-adjusted Price | 4.62 |  
                
             | 
 |  PVC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 9/13/2012 | +0.30 / +2.42% | 12.50 | 12.70 | 12.10 | 12.70 | 12.38 | 4.62 | 100,217 |   |  
            | 9/12/2012 | 0.00 / 0.00% | 12.10 | 12.70 | 12.10 | 12.40 | 12.57 | 4.51 | 28,300 |   |  			
            | 9/11/2012 | +0.10 / +0.81% | 12.30 | 12.50 | 12.10 | 12.40 | 12.28 | 4.51 | 65,300 |   |  
            | 9/10/2012 | -0.90 / -6.82% | 13.00 | 13.00 | 12.30 | 12.30 | 12.41 | 4.47 | 258,400 |   |  			
            | 9/7/2012 | 0.00 / 0.00% | 13.20 | 13.40 | 13.00 | 13.20 | 13.17 | 4.80 | 63,600 |   |  
            | 9/6/2012 | -0.20 / -1.49% | 13.40 | 13.40 | 13.10 | 13.20 | 13.27 | 4.80 | 63,800 |   |  			
            | 9/5/2012 | -0.20 / -1.47% | 13.50 | 13.50 | 13.10 | 13.40 | 13.27 | 4.87 | 49,178 |   |  
            | 9/4/2012 | +0.10 / +0.74% | 13.50 | 13.70 | 13.50 | 13.60 | 13.55 | 4.94 | 75,300 |   |  			
            | 8/31/2012 | 0.00 / 0.00% | 13.20 | 13.50 | 13.20 | 13.50 | 13.43 | 4.91 | 48,200 |   |  
            | 8/30/2012 | -0.10 / -0.74% | 13.70 | 13.70 | 13.40 | 13.50 | 13.53 | 4.91 | 44,100 |   |  			
            | 8/29/2012 | +0.70 / +5.43% | 13.30 | 13.70 | 13.10 | 13.60 | 13.51 | 4.94 | 97,088 |   |  
            | 8/28/2012 | +0.30 / +2.38% | 12.50 | 12.90 | 12.30 | 12.90 | 12.60 | 4.69 | 69,700 |   |  			
            | 8/27/2012 | -0.80 / -5.97% | 13.50 | 13.50 | 12.60 | 12.60 | 12.75 | 4.58 | 136,820 |   |  
            | 8/24/2012 | +0.40 / +3.08% | 12.20 | 13.90 | 12.20 | 13.40 | 13.27 | 4.87 | 150,600 |   |  			
            | 8/23/2012 | -0.70 / -5.11% | 13.80 | 13.80 | 13.00 | 13.00 | 13.05 | 4.73 | 165,300 |   |  
            | 8/22/2012 | -0.40 / -2.84% | 14.00 | 14.10 | 13.60 | 13.70 | 13.86 | 4.98 | 135,417 |   |  			
            | 8/21/2012 | -1.00 / -6.62% | 15.20 | 15.20 | 14.10 | 14.10 | 14.23 | 5.13 | 239,700 |   |  
            | 8/20/2012 | +0.30 / +2.03% | 14.80 | 15.10 | 14.80 | 15.10 | 14.99 | 5.49 | 92,800 |   |  			
            | 8/17/2012 | +0.10 / +0.68% | 14.60 | 15.00 | 14.60 | 14.80 | 14.85 | 5.38 | 162,830 |   |  
            | 8/16/2012 | +0.10 / +0.68% | 14.60 | 14.70 | 14.50 | 14.70 | 14.60 | 5.34 | 78,020 |   |  			
            | 8/15/2012 | 0.00 / 0.00% | 14.60 | 14.60 | 14.40 | 14.60 | 14.48 | 5.31 | 39,572 |   |  
            | 8/14/2012 | +0.10 / +0.69% | 14.60 | 14.80 | 14.60 | 14.60 | 14.67 | 5.31 | 21,519 |   |  			
            | 8/13/2012 | -0.30 / -2.03% | 14.50 | 14.60 | 14.40 | 14.50 | 14.51 | 5.27 | 35,710 |   |  
            | 8/10/2012 | 0.00 / 0.00% | 14.70 | 14.80 | 14.50 | 14.80 | 14.56 | 5.38 | 82,228 |   |  			
            | 8/9/2012 | -0.20 / -1.33% | 15.10 | 15.10 | 14.60 | 14.80 | 14.83 | 5.38 | 24,765 |   |  
            | 8/8/2012 | +0.30 / +2.04% | 14.60 | 15.00 | 14.50 | 15.00 | 14.81 | 5.45 | 90,451 |   |  			
            | 8/7/2012 | -0.30 / -2.00% | 15.00 | 15.00 | 14.60 | 14.70 | 14.77 | 5.34 | 68,600 |   |  
            | 8/6/2012 | +0.50 / +3.45% | 14.60 | 15.30 | 14.50 | 15.00 | 14.77 | 5.45 | 204,948 |   |  			
            | 8/3/2012 | -0.10 / -0.68% | 14.60 | 14.60 | 14.50 | 14.50 | 14.54 | 5.27 | 27,766 |   |  
            | 8/2/2012 | +0.30 / +2.10% | 14.50 | 14.80 | 14.50 | 14.60 | 14.59 | 5.31 | 30,100 |   |  |