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                    Closing price on 4/13/2012
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                    | Open | 5.80 |  
                    | High | 5.80 |  
                    | Low | 5.70 |  
                    | Volume | 517,000 |  
                    | Split-adjusted Price | 3.01 |  
                
             | 
 |  VKC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 3/26/2012 | +0.20 / +3.77% | 5.50 | 5.50 | 5.40 | 5.50 | 5.49 | 2.85 | 517,200 |   |  			
            | 3/23/2012 | +0.30 / +6.00% | 5.10 | 5.30 | 5.00 | 5.30 | 5.20 | 2.75 | 485,500 |   |  
            | 3/22/2012 | -0.10 / -1.96% | 5.00 | 5.10 | 5.00 | 5.00 | 5.04 | 2.59 | 205,000 |   |  			
            | 3/21/2012 | +0.20 / +4.08% | 4.90 | 5.20 | 4.90 | 5.10 | 5.08 | 2.65 | 389,200 |   |  
            | 3/20/2012 | +0.10 / +2.08% | 5.00 | 5.00 | 4.80 | 4.90 | 4.88 | 2.54 | 109,700 |   |  			
            | 3/19/2012 | -0.20 / -4.00% | 5.20 | 5.40 | 4.80 | 4.80 | 4.97 | 2.49 | 122,400 |   |  
            | 3/16/2012 | -0.10 / -1.96% | 5.00 | 5.10 | 4.90 | 5.00 | 5.06 | 2.59 | 292,300 |   |  			
            | 3/15/2012 | +0.50 / +10.87% | 4.80 | 5.10 | 4.60 | 5.10 | 4.84 | 2.65 | 485,300 |   |  
            | 3/14/2012 | -0.30 / -6.12% | 4.80 | 5.00 | 4.60 | 4.60 | 4.79 | 2.39 | 297,500 |   |  			
            | 3/13/2012 | +0.20 / +4.26% | 4.80 | 4.90 | 4.70 | 4.90 | 4.80 | 2.54 | 82,900 |   |  
            | 3/12/2012 | +0.10 / +2.17% | 4.70 | 4.80 | 4.50 | 4.70 | 4.68 | 2.44 | 336,400 |   |  			
            | 3/9/2012 | -0.20 / -4.17% | 4.60 | 4.80 | 4.60 | 4.60 | 4.61 | 2.39 | 232,300 |   |  
            | 3/8/2012 | -0.30 / -5.88% | 5.10 | 5.10 | 4.80 | 4.80 | 4.90 | 2.49 | 174,000 |   |  			
            | 3/7/2012 | -0.10 / -1.92% | 5.40 | 5.40 | 5.10 | 5.10 | 5.15 | 2.65 | 340,100 |   |  
            | 3/6/2012 | -0.20 / -3.70% | 5.70 | 5.70 | 5.10 | 5.20 | 5.35 | 2.70 | 343,500 |   |  			
            | 3/5/2012 | +0.30 / +5.88% | 5.20 | 5.40 | 5.20 | 5.40 | 5.35 | 2.80 | 182,800 |   |  
            | 3/2/2012 | 0.00 / 0.00% | 5.00 | 5.20 | 5.00 | 5.10 | 5.06 | 2.65 | 235,100 |   |  |