| 
                 
                    Closing price on 7/6/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    37.20 | 
                 
                
                    | High | 
                    37.80 | 
                 
                
                    | Low | 
                    35.00 | 
                     
                
                    | Volume | 
                    181,900 | 
                                 
                
                    | Split-adjusted Price | 
                    22.27 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
CVN Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/6/2011
             | 
            
                +0.90 / +2.64%
             |             
            
                37.20
             |           
            
                37.80
             |               
            
                35.00
             |                           
            
                35.00
             | 
            
                37.45
             |                     
            
                22.27
             |                                 
            
                181,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/5/2011
             | 
            
                -2.20 / -6.06%
             |             
            
                36.50
             |           
            
                37.50
             |               
            
                34.10
             |                           
            
                34.10
             | 
            
                37.27
             |                     
            
                21.70
             |                                 
            
                132,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/4/2011
             | 
            
                +0.30 / +0.83%
             |             
            
                36.30
             |           
            
                36.80
             |               
            
                36.30
             |                           
            
                36.30
             | 
            
                36.46
             |                     
            
                23.10
             |                                 
            
                7,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/1/2011
             | 
            
                +2.40 / +7.14%
             |             
            
                36.40
             |           
            
                36.50
             |               
            
                36.00
             |                           
            
                36.00
             | 
            
                36.31
             |                     
            
                22.91
             |                                 
            
                86,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/30/2011
             | 
            
                -0.30 / -0.88%
             |             
            
                34.00
             |           
            
                36.50
             |               
            
                33.60
             |                           
            
                33.60
             | 
            
                36.26
             |                     
            
                21.38
             |                                 
            
                66,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/29/2011
             | 
            
                -0.10 / -0.29%
             |             
            
                36.30
             |           
            
                36.50
             |               
            
                33.90
             |                           
            
                33.90
             | 
            
                36.06
             |                     
            
                21.57
             |                                 
            
                77,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/28/2011
             | 
            
                -2.10 / -5.82%
             |             
            
                36.50
             |           
            
                36.50
             |               
            
                34.00
             |                           
            
                34.00
             | 
            
                36.40
             |                     
            
                21.64
             |                                 
            
                53,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/27/2011
             | 
            
                +0.40 / +1.12%
             |             
            
                36.50
             |           
            
                36.50
             |               
            
                36.10
             |                           
            
                36.10
             | 
            
                36.48
             |                     
            
                22.97
             |                                 
            
                24,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/24/2011
             | 
            
                -0.10 / -0.28%
             |             
            
                36.30
             |           
            
                36.90
             |               
            
                35.70
             |                           
            
                35.70
             | 
            
                36.59
             |                     
            
                22.72
             |                                 
            
                172,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/23/2011
             | 
            
                -0.40 / -1.10%
             |             
            
                36.10
             |           
            
                36.40
             |               
            
                35.50
             |                           
            
                35.80
             | 
            
                36.28
             |                     
            
                22.78
             |                                 
            
                69,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/22/2011
             | 
            
                0.00 / 0.00%
             |             
            
                36.40
             |           
            
                36.40
             |               
            
                35.70
             |                           
            
                36.20
             | 
            
                36.11
             |                     
            
                23.04
             |                                 
            
                30,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2011
             | 
            
                +0.40 / +1.12%
             |             
            
                36.00
             |           
            
                37.00
             |               
            
                35.80
             |                           
            
                36.20
             | 
            
                36.44
             |                     
            
                23.04
             |                                 
            
                106,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/20/2011
             | 
            
                -0.30 / -0.83%
             |             
            
                36.00
             |           
            
                36.00
             |               
            
                35.80
             |                           
            
                35.80
             | 
            
                35.96
             |                     
            
                22.78
             |                                 
            
                42,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/17/2011
             | 
            
                -0.20 / -0.55%
             |             
            
                36.20
             |           
            
                36.50
             |               
            
                35.90
             |                           
            
                36.10
             | 
            
                36.06
             |                     
            
                22.97
             |                                 
            
                32,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/16/2011
             | 
            
                +1.80 / +5.22%
             |             
            
                36.00
             |           
            
                37.30
             |               
            
                33.80
             |                           
            
                36.30
             | 
            
                36.13
             |                     
            
                23.10
             |                                 
            
                57,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/15/2011
             | 
            
                -1.00 / -2.82%
             |             
            
                35.00
             |           
            
                36.50
             |               
            
                34.50
             |                           
            
                34.50
             | 
            
                36.27
             |                     
            
                21.95
             |                                 
            
                70,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2011
             | 
            
                -0.40 / -1.11%
             |             
            
                36.20
             |           
            
                38.70
             |               
            
                33.70
             |                           
            
                35.50
             | 
            
                36.13
             |                     
            
                22.59
             |                                 
            
                85,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2011
             | 
            
                -0.60 / -1.64%
             |             
            
                35.10
             |           
            
                36.60
             |               
            
                35.10
             |                           
            
                35.90
             | 
            
                36.24
             |                     
            
                22.85
             |                                 
            
                128,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/10/2011
             | 
            
                +1.50 / +4.29%
             |             
            
                35.00
             |           
            
                37.00
             |               
            
                35.00
             |                           
            
                36.50
             | 
            
                36.20
             |                     
            
                23.23
             |                                 
            
                43,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/9/2011
             | 
            
                +2.60 / +8.02%
             |             
            
                32.50
             |           
            
                35.40
             |               
            
                32.50
             |                           
            
                35.00
             | 
            
                34.62
             |                     
            
                22.27
             |                                 
            
                239,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/8/2011
             | 
            
                -0.60 / -1.82%
             |             
            
                33.00
             |           
            
                34.00
             |               
            
                32.10
             |                           
            
                32.40
             | 
            
                33.18
             |                     
            
                20.62
             |                                 
            
                52,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2011
             | 
            
                +2.00 / +6.45%
             |             
            
                30.90
             |           
            
                33.00
             |               
            
                30.80
             |                           
            
                33.00
             | 
            
                31.96
             |                     
            
                21.00
             |                                 
            
                185,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2011
             | 
            
                +0.10 / +0.32%
             |             
            
                30.00
             |           
            
                32.00
             |               
            
                29.60
             |                           
            
                31.00
             | 
            
                30.93
             |                     
            
                19.73
             |                                 
            
                66,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2011
             | 
            
                -0.10 / -0.32%
             |             
            
                31.00
             |           
            
                31.20
             |               
            
                30.50
             |                           
            
                30.90
             | 
            
                30.86
             |                     
            
                19.66
             |                                 
            
                43,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/2/2011
             | 
            
                +1.90 / +6.53%
             |             
            
                27.60
             |           
            
                31.00
             |               
            
                27.50
             |                           
            
                31.00
             | 
            
                29.85
             |                     
            
                19.73
             |                                 
            
                188,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2011
             | 
            
                +2.30 / +8.58%
             |             
            
                28.60
             |           
            
                29.20
             |               
            
                28.60
             |                           
            
                29.10
             | 
            
                29.03
             |                     
            
                18.52
             |                                 
            
                157,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2011
             | 
            
                -1.20 / -4.29%
             |             
            
                26.60
             |           
            
                27.50
             |               
            
                26.30
             |                           
            
                26.80
             | 
            
                27.32
             |                     
            
                17.05
             |                                 
            
                45,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2011
             | 
            
                -0.80 / -2.78%
             |             
            
                28.30
             |           
            
                28.30
             |               
            
                27.50
             |                           
            
                28.00
             | 
            
                28.01
             |                     
            
                17.82
             |                                 
            
                40,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2011
             | 
            
                +1.30 / +4.73%
             |             
            
                28.60
             |           
            
                28.80
             |               
            
                28.60
             |                           
            
                28.80
             | 
            
                28.76
             |                     
            
                18.33
             |                                 
            
                391,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/26/2011
             | 
            
                +3.00 / +12.24%
             |             
            
                24.50
             |           
            
                27.60
             |               
            
                24.00
             |                           
            
                27.50
             | 
            
                27.05
             |                     
            
                17.50
             |                                 
            
                182,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |