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                    Closing price on 8/21/2012
                 |  |  
    
        |           
                
                    | Open | 15.20 |  
                    | High | 15.20 |  
                    | Low | 14.10 |  
                    | Volume | 239,700 |  
                    | Split-adjusted Price | 5.13 |  
                
             | 
 |  PVC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  			
            | 8/1/2012 | 0.00 / 0.00% | 14.30 | 14.30 | 14.00 | 14.30 | 14.07 | 5.20 | 64,600 |   |  
            | 7/31/2012 | -0.20 / -1.38% | 14.70 | 14.70 | 14.20 | 14.30 | 14.38 | 5.20 | 56,400 |   |  			
            | 7/30/2012 | -0.10 / -0.68% | 14.50 | 14.60 | 14.40 | 14.50 | 14.51 | 5.27 | 127,600 |   |  
            | 7/27/2012 | -0.10 / -0.68% | 15.00 | 15.00 | 14.60 | 14.60 | 14.70 | 5.31 | 80,100 |   |  			
            | 7/26/2012 | 0.00 / 0.00% | 14.80 | 14.90 | 14.60 | 14.70 | 14.74 | 5.34 | 97,528 |   |  
            | 7/25/2012 | -0.10 / -0.68% | 14.60 | 14.90 | 14.50 | 14.70 | 14.65 | 5.34 | 80,900 |   |  			
            | 7/24/2012 | -0.40 / -2.63% | 15.00 | 15.10 | 14.70 | 14.80 | 14.84 | 5.38 | 133,200 |   |  
            | 7/23/2012 | -0.30 / -1.94% | 15.80 | 15.80 | 15.00 | 15.20 | 15.26 | 5.53 | 166,900 |   |  			
            | 7/20/2012 | +0.10 / +0.65% | 15.60 | 16.30 | 15.50 | 15.50 | 16.00 | 5.64 | 342,146 |   |  
            | 7/19/2012 | +1.00 / +6.94% | 14.60 | 15.40 | 14.60 | 15.40 | 15.30 | 5.60 | 390,944 |   |  			
            | 7/18/2012 | -0.30 / -2.04% | 14.60 | 14.70 | 14.00 | 14.40 | 14.30 | 5.24 | 63,020 |   |  
            | 7/17/2012 | +0.70 / +5.00% | 14.00 | 14.70 | 14.00 | 14.70 | 14.40 | 5.34 | 75,944 |   |  			
            | 7/16/2012 | -0.40 / -2.78% | 14.40 | 14.40 | 14.00 | 14.00 | 14.26 | 5.09 | 65,270 |   |  
            | 7/13/2012 | +0.30 / +2.13% | 14.10 | 14.70 | 14.10 | 14.40 | 14.40 | 5.24 | 135,400 |   |  			
            | 7/12/2012 | +0.50 / +3.68% | 13.60 | 14.20 | 13.60 | 14.10 | 13.92 | 5.13 | 95,000 |   |  
            | 7/11/2012 | +0.40 / +3.03% | 13.30 | 13.60 | 13.30 | 13.60 | 13.53 | 4.94 | 85,300 |   |  |