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                    Closing price on 5/10/2012
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                    | Open | 8.00 |  
                    | High | 8.00 |  
                    | Low | 7.30 |  
                    | Volume | 333,700 |  
                    | Split-adjusted Price | 3.84 |  
                
             | 
 |  VKC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  			
            | 4/24/2012 | +0.40 / +6.45% | 6.10 | 6.60 | 5.90 | 6.60 | 6.37 | 3.42 | 317,600 |   |  
            | 4/23/2012 | 0.00 / 0.00% | 6.20 | 6.40 | 6.00 | 6.20 | 6.26 | 3.22 | 319,800 |   |  			
            | 4/20/2012 | -0.40 / -6.06% | 6.40 | 6.60 | 6.20 | 6.20 | 6.27 | 3.22 | 604,100 |   |  
            | 4/19/2012 | -0.40 / -5.71% | 7.40 | 7.40 | 6.60 | 6.60 | 6.94 | 3.42 | 1,370,100 |   |  			
            | 4/18/2012 | +0.40 / +6.06% | 7.00 | 7.00 | 7.00 | 7.00 | 7.00 | 3.63 | 146,100 |   |  
            | 4/17/2012 | +0.40 / +6.45% | 6.60 | 6.60 | 6.60 | 6.60 | 6.60 | 3.42 | 41,200 |   |  			
            | 4/16/2012 | +0.40 / +6.90% | 6.00 | 6.20 | 6.00 | 6.20 | 6.18 | 3.22 | 343,000 |   |  
            | 4/13/2012 | +0.30 / +5.45% | 5.80 | 5.80 | 5.70 | 5.80 | 5.80 | 3.01 | 517,000 |   |  			
            | 4/12/2012 | +0.30 / +5.77% | 5.30 | 5.50 | 5.20 | 5.50 | 5.41 | 2.85 | 826,300 |   |  
            | 4/11/2012 | +0.10 / +1.96% | 5.20 | 5.30 | 5.10 | 5.20 | 5.19 | 2.70 | 340,600 |   |  			
            | 4/10/2012 | 0.00 / 0.00% | 5.20 | 5.20 | 5.00 | 5.10 | 5.06 | 2.65 | 311,400 |   |  
            | 4/9/2012 | +0.20 / +4.08% | 5.00 | 5.20 | 4.90 | 5.10 | 5.03 | 2.65 | 304,500 |   |  			
            | 4/6/2012 | 0.00 / 0.00% | 5.00 | 5.00 | 4.70 | 4.90 | 4.90 | 2.54 | 199,500 |   |  
            | 4/5/2012 | +0.10 / +2.08% | 4.70 | 4.90 | 4.60 | 4.90 | 4.76 | 2.54 | 170,000 |   |  			
            | 4/4/2012 | -0.20 / -4.00% | 4.90 | 4.90 | 4.70 | 4.80 | 4.78 | 2.49 | 360,100 |   |  
            | 4/3/2012 | +0.20 / +4.17% | 4.80 | 5.00 | 4.60 | 5.00 | 4.81 | 2.59 | 202,700 |   |  			
            | 3/30/2012 | -0.30 / -5.88% | 4.90 | 5.00 | 4.80 | 4.80 | 4.83 | 2.49 | 297,700 |   |  
            | 3/29/2012 | -0.20 / -3.77% | 5.40 | 5.40 | 5.10 | 5.10 | 5.21 | 2.65 | 175,000 |   |  			
            | 3/28/2012 | 0.00 / 0.00% | 5.20 | 5.40 | 5.10 | 5.30 | 5.24 | 2.75 | 214,700 |   |  
            | 3/27/2012 | -0.20 / -3.64% | 5.80 | 5.80 | 5.30 | 5.30 | 5.54 | 2.75 | 344,000 |   |  |