| 
                 
                    Closing price on 3/7/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    28.10 | 
                 
                
                    | High | 
                    28.50 | 
                 
                
                    | Low | 
                    28.10 | 
                     
                
                    | Volume | 
                    6,400 | 
                                 
                
                    | Split-adjusted Price | 
                    17.88 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
CVN Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2011
             | 
            
                -1.30 / -4.41%
             |             
            
                29.50
             |           
            
                30.30
             |               
            
                28.20
             |                           
            
                28.20
             | 
            
                28.77
             |                     
            
                17.95
             |                                 
            
                46,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/11/2011
             | 
            
                -3.60 / -10.88%
             |             
            
                31.70
             |           
            
                32.00
             |               
            
                29.30
             |                           
            
                29.50
             | 
            
                30.26
             |                     
            
                18.77
             |                                 
            
                66,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/10/2011
             | 
            
                +2.10 / +6.77%
             |             
            
                33.10
             |           
            
                33.10
             |               
            
                28.90
             |                           
            
                33.10
             | 
            
                31.12
             |                     
            
                21.06
             |                                 
            
                68,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/9/2011
             | 
            
                +1.60 / +5.44%
             |             
            
                31.00
             |           
            
                31.20
             |               
            
                30.50
             |                           
            
                31.00
             | 
            
                31.01
             |                     
            
                19.73
             |                                 
            
                93,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/8/2011
             | 
            
                +1.70 / +6.14%
             |             
            
                28.50
             |           
            
                29.40
             |               
            
                28.00
             |                           
            
                29.40
             | 
            
                29.20
             |                     
            
                18.71
             |                                 
            
                85,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2011
             | 
            
                +1.70 / +6.54%
             |             
            
                26.00
             |           
            
                27.70
             |               
            
                26.00
             |                           
            
                27.70
             | 
            
                27.47
             |                     
            
                17.63
             |                                 
            
                66,300
             |            
            
                 
             |                                       
         
    
        
            | 
                1/27/2011
             | 
            
                +1.10 / +4.42%
             |             
            
                25.00
             |           
            
                26.00
             |               
            
                25.00
             |                           
            
                26.00
             | 
            
                25.91
             |                     
            
                16.55
             |                                 
            
                38,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/26/2011
             | 
            
                +1.50 / +6.41%
             |             
            
                21.70
             |           
            
                24.90
             |               
            
                21.70
             |                           
            
                24.90
             | 
            
                24.43
             |                     
            
                15.85
             |                                 
            
                63,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2011
             | 
            
                +1.20 / +5.41%
             |             
            
                23.10
             |           
            
                23.60
             |               
            
                21.50
             |                           
            
                23.40
             | 
            
                23.30
             |                     
            
                14.89
             |                                 
            
                87,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2011
             | 
            
                +1.40 / +6.73%
             |             
            
                22.20
             |           
            
                22.20
             |               
            
                22.00
             |                           
            
                22.20
             | 
            
                22.08
             |                     
            
                14.13
             |                                 
            
                85,900
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2011
             | 
            
                +0.90 / +4.52%
             |             
            
                20.80
             |           
            
                20.80
             |               
            
                20.80
             |                           
            
                20.80
             | 
            
                20.80
             |                     
            
                13.24
             |                                 
            
                60,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/20/2011
             | 
            
                +1.30 / +6.99%
             |             
            
                19.90
             |           
            
                19.90
             |               
            
                19.00
             |                           
            
                19.90
             | 
            
                19.52
             |                     
            
                12.66
             |                                 
            
                58,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2011
             | 
            
                -10.50 / -36.08%
             |             
            
                18.60
             |           
            
                18.60
             |               
            
                18.60
             |                           
            
                18.60
             | 
            
                18.60
             |                     
            
                11.84
             |                                 
            
                1,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2011
             | 
            
                -0.40 / -1.36%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                29.10
             |                           
            
                29.10
             | 
            
                32.72
             |                     
            
                18.52
             |                                 
            
                32,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2011
             | 
            
                -0.10 / -0.34%
             |             
            
                31.40
             |           
            
                31.50
             |               
            
                27.70
             |                           
            
                29.50
             | 
            
                31.16
             |                     
            
                18.77
             |                                 
            
                51,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |