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                    Closing price on 6/7/2012
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                    | Open | 6.20 |  
                    | High | 6.50 |  
                    | Low | 6.10 |  
                    | Volume | 352,600 |  
                    | Split-adjusted Price | 3.32 |  
                
             | 
 |  VKC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/7/2012 | +0.30 / +4.92% | 6.20 | 6.50 | 6.10 | 6.40 | 6.37 | 3.32 | 352,600 |   |  
            | 6/6/2012 | +0.10 / +1.67% | 6.10 | 6.20 | 6.00 | 6.10 | 6.05 | 3.16 | 138,500 |   |  			
            | 6/5/2012 | +0.30 / +5.26% | 5.70 | 6.00 | 5.60 | 6.00 | 5.81 | 3.11 | 167,600 |   |  
            | 6/4/2012 | -0.20 / -3.39% | 5.80 | 5.80 | 5.60 | 5.70 | 5.67 | 2.96 | 68,700 |   |  			
            | 6/1/2012 | 0.00 / 0.00% | 5.90 | 6.10 | 5.80 | 5.90 | 5.90 | 3.06 | 112,100 |   |  
            | 5/31/2012 | -0.30 / -4.84% | 6.10 | 6.20 | 5.80 | 5.90 | 6.00 | 3.06 | 114,200 |   |  			
            | 5/30/2012 | -0.10 / -1.59% | 6.30 | 6.40 | 6.10 | 6.20 | 6.22 | 3.22 | 194,900 |   |  
            | 5/29/2012 | -0.10 / -1.56% | 6.40 | 6.50 | 6.20 | 6.30 | 6.27 | 3.27 | 127,500 |   |  			
            | 5/28/2012 | +0.10 / +1.59% | 6.60 | 6.70 | 6.30 | 6.40 | 6.56 | 3.32 | 385,000 |   |  
            | 5/25/2012 | +0.30 / +5.00% | 6.30 | 6.30 | 6.10 | 6.30 | 6.25 | 3.27 | 192,000 |   |  			
            | 5/24/2012 | +0.20 / +3.45% | 5.80 | 6.00 | 5.50 | 6.00 | 5.80 | 3.11 | 277,400 |   |  
            | 5/23/2012 | -0.40 / -6.45% | 6.20 | 6.20 | 5.80 | 5.80 | 5.85 | 3.01 | 148,000 |   |  			
            | 5/22/2012 | +0.20 / +3.33% | 6.20 | 6.40 | 6.00 | 6.20 | 6.13 | 3.22 | 373,500 |   |  
            | 5/21/2012 | +0.30 / +5.26% | 5.90 | 6.00 | 5.90 | 6.00 | 5.98 | 3.11 | 74,700 |   |  			
            | 5/18/2012 | -0.40 / -6.56% | 6.00 | 6.10 | 5.70 | 5.70 | 5.82 | 2.96 | 377,100 |   |  
            | 5/17/2012 | -0.30 / -4.69% | 6.50 | 6.60 | 6.10 | 6.10 | 6.35 | 3.16 | 159,200 |   |  			
            | 5/16/2012 | +0.20 / +3.23% | 6.00 | 6.40 | 5.90 | 6.40 | 6.17 | 3.32 | 310,300 |   |  
            | 5/15/2012 | -0.40 / -6.06% | 6.60 | 6.70 | 6.20 | 6.20 | 6.27 | 3.22 | 609,500 |   |  			
            | 5/14/2012 | -0.40 / -5.71% | 6.80 | 7.00 | 6.60 | 6.60 | 6.68 | 3.42 | 384,400 |   |  
            | 5/11/2012 | -0.40 / -5.41% | 7.50 | 7.50 | 7.00 | 7.00 | 7.16 | 3.63 | 374,400 |   |  			
            | 5/10/2012 | -0.60 / -7.50% | 8.00 | 8.00 | 7.30 | 7.40 | 7.64 | 3.84 | 333,700 |   |  
            | 5/9/2012 | +0.30 / +3.90% | 7.40 | 8.20 | 7.30 | 8.00 | 7.70 | 4.15 | 492,700 |   |  			
            | 5/8/2012 | -0.50 / -6.10% | 8.50 | 8.50 | 7.70 | 7.70 | 7.89 | 3.99 | 547,500 |   |  
            | 5/7/2012 | +0.50 / +6.49% | 8.20 | 8.20 | 7.70 | 8.20 | 8.10 | 4.25 | 405,600 |   |  			
            | 5/4/2012 | +0.50 / +6.94% | 7.40 | 7.70 | 7.00 | 7.70 | 7.46 | 3.99 | 558,200 |   |  
            | 5/3/2012 | 0.00 / 0.00% | 7.30 | 7.30 | 6.80 | 7.20 | 7.07 | 3.74 | 411,700 |   |  			
            | 5/2/2012 | +0.40 / +5.88% | 7.20 | 7.20 | 6.80 | 7.20 | 7.16 | 3.74 | 763,600 |   |  
            | 4/27/2012 | +0.50 / +7.94% | 6.30 | 6.80 | 6.30 | 6.80 | 6.66 | 3.53 | 575,500 |   |  			
            | 4/26/2012 | -0.40 / -5.97% | 6.70 | 6.70 | 6.30 | 6.30 | 6.42 | 3.27 | 349,000 |   |  
            | 4/25/2012 | +0.10 / +1.52% | 6.90 | 6.90 | 6.60 | 6.70 | 6.79 | 3.48 | 451,900 |   |  |