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                    Closing price on 3/28/2011
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                    | Open | 27.70 |  
                    | High | 27.70 |  
                    | Low | 27.70 |  
                    | Volume | 1,400 |  
                    | Split-adjusted Price | 17.63 |  
                
             | 
 |  CVN Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/28/2011 | -0.80 / -2.81% | 27.70 | 27.70 | 27.70 | 27.70 | 27.70 | 17.63 | 1,400 |   |  
            | 3/25/2011 | -0.50 / -1.72% | 28.60 | 29.30 | 27.00 | 28.50 | 28.36 | 18.14 | 67,100 |   |  			
            | 3/24/2011 | +0.50 / +1.75% | 27.90 | 29.00 | 27.90 | 29.00 | 28.55 | 18.45 | 11,600 |   |  
            | 3/23/2011 | +2.20 / +8.37% | 26.70 | 28.50 | 26.50 | 28.50 | 27.88 | 18.14 | 23,400 |   |  			
            | 3/22/2011 | +0.30 / +1.15% | 26.30 | 27.20 | 26.30 | 26.30 | 26.73 | 16.74 | 11,000 |   |  
            | 3/21/2011 | -0.50 / -1.89% | 26.40 | 26.40 | 26.00 | 26.00 | 26.26 | 16.55 | 10,500 |   |  			
            | 3/18/2011 | +0.50 / +1.92% | 26.00 | 26.70 | 26.00 | 26.50 | 26.41 | 16.86 | 61,600 |   |  
            | 3/17/2011 | +1.00 / +4.00% | 26.00 | 26.00 | 25.30 | 26.00 | 25.70 | 16.55 | 12,800 |   |  			
            | 3/16/2011 | 0.00 / 0.00% | 25.00 | 25.50 | 25.00 | 25.00 | 25.34 | 15.91 | 12,300 |   |  
            | 3/15/2011 | -1.10 / -4.21% | 24.30 | 25.00 | 24.30 | 25.00 | 24.56 | 15.91 | 13,600 |   |  			
            | 3/14/2011 | -1.80 / -6.45% | 26.10 | 26.10 | 26.10 | 26.10 | 26.10 | 16.61 | 4,700 |   |  
            | 3/11/2011 | -2.30 / -7.62% | 29.00 | 29.00 | 27.90 | 27.90 | 28.00 | 17.75 | 11,600 |   |  			
            | 3/10/2011 | +1.80 / +6.34% | 28.40 | 30.30 | 28.40 | 30.20 | 29.87 | 19.22 | 230,200 |   |  
            | 3/9/2011 | -0.10 / -0.35% | 29.20 | 29.20 | 28.00 | 28.40 | 28.44 | 18.07 | 15,500 |   |  			
            | 3/8/2011 | +0.40 / +1.42% | 28.50 | 30.00 | 28.50 | 28.50 | 29.20 | 18.14 | 22,600 |   |  
            | 3/7/2011 | +0.10 / +0.36% | 28.10 | 28.50 | 28.10 | 28.10 | 28.13 | 17.88 | 6,400 |   |  			
            | 3/4/2011 | +2.00 / +7.69% | 28.00 | 28.50 | 28.00 | 28.00 | 28.09 | 17.82 | 9,300 |   |  
            | 3/3/2011 | 0.00 / 0.00% | 27.00 | 27.70 | 26.00 | 26.00 | 27.24 | 16.55 | 5,900 |   |  			
            | 3/2/2011 | -1.00 / -3.70% | 26.30 | 26.30 | 26.00 | 26.00 | 26.04 | 16.55 | 12,400 |   |  
            | 3/1/2011 | 0.00 / 0.00% | 27.70 | 28.00 | 26.70 | 27.00 | 27.31 | 17.18 | 18,600 |   |  			
            | 2/28/2011 | 0.00 / 0.00% | 25.50 | 28.10 | 25.50 | 27.00 | 27.74 | 17.18 | 58,000 |   |  
            | 2/25/2011 | +1.00 / +3.85% | 25.50 | 27.00 | 25.50 | 27.00 | 26.63 | 17.18 | 51,000 |   |  			
            | 2/24/2011 | 0.00 / 0.00% | 25.00 | 26.20 | 24.20 | 26.00 | 25.52 | 16.55 | 43,800 |   |  
            | 2/23/2011 | +0.70 / +2.77% | 25.30 | 26.50 | 25.30 | 26.00 | 25.96 | 16.55 | 21,900 |   |  			
            | 2/22/2011 | -1.60 / -5.95% | 25.50 | 26.30 | 25.30 | 25.30 | 25.72 | 16.10 | 26,100 |   |  
            | 2/21/2011 | -1.50 / -5.28% | 28.10 | 28.10 | 26.90 | 26.90 | 27.17 | 17.12 | 45,900 |   |  			
            | 2/18/2011 | -1.60 / -5.33% | 30.80 | 31.00 | 28.40 | 28.40 | 28.91 | 18.07 | 101,700 |   |  
            | 2/17/2011 | -0.90 / -2.91% | 31.00 | 31.00 | 29.40 | 30.00 | 30.45 | 19.09 | 48,500 |   |  			
            | 2/16/2011 | +0.40 / +1.31% | 30.00 | 31.00 | 30.00 | 30.90 | 30.82 | 19.66 | 63,900 |   |  
            | 2/15/2011 | +2.30 / +8.16% | 27.00 | 30.50 | 26.80 | 30.50 | 28.96 | 19.41 | 48,500 |   |  |