| 
                 
                    Closing price on 3/11/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    9.10 | 
                 
                
                    | High | 
                    9.20 | 
                 
                
                    | Low | 
                    9.00 | 
                     
                
                    | Volume | 
                    38,200 | 
                                 
                
                    | Split-adjusted Price | 
                    1.49 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
CVT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/11/2013
             | 
            
                +0.10 / +1.10%
             |             
            
                9.10
             |           
            
                9.20
             |               
            
                9.00
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                1.49
             |                                 
            
                38,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2013
             | 
            
                -0.10 / -1.09%
             |             
            
                9.10
             |           
            
                9.10
             |               
            
                8.70
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                1.47
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.60
             |           
            
                9.20
             |               
            
                8.60
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                1.49
             |                                 
            
                1,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2013
             | 
            
                +0.60 / +6.98%
             |             
            
                8.60
             |           
            
                9.20
             |               
            
                8.60
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                1.49
             |                                 
            
                600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2013
             | 
            
                +0.10 / +1.18%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                1.39
             |                                 
            
                1,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2013
             | 
            
                -0.40 / -4.49%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.50
             |                           
            
                8.50
             | 
            
                8.50
             |                     
            
                1.37
             |                                 
            
                7,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.90
             |           
            
                8.90
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                1.44
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2013
             | 
            
                -0.20 / -2.20%
             |             
            
                9.10
             |           
            
                9.10
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                1.44
             |                                 
            
                2,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2013
             | 
            
                +0.50 / +5.81%
             |             
            
                9.10
             |           
            
                9.10
             |               
            
                9.10
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                1.47
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2013
             | 
            
                -0.50 / -5.49%
             |             
            
                8.80
             |           
            
                9.00
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                1.39
             |                                 
            
                4,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2013
             | 
            
                +0.10 / +1.11%
             |             
            
                9.10
             |           
            
                9.10
             |               
            
                8.80
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                1.47
             |                                 
            
                2,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2013
             | 
            
                +0.20 / +2.27%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.40
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                1.46
             |                                 
            
                30,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2013
             | 
            
                -0.60 / -6.38%
             |             
            
                9.20
             |           
            
                9.30
             |               
            
                8.80
             |                           
            
                8.80
             | 
            
                8.80
             |                     
            
                1.42
             |                                 
            
                23,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2013
             | 
            
                +0.10 / +1.08%
             |             
            
                9.70
             |           
            
                9.70
             |               
            
                9.20
             |                           
            
                9.40
             | 
            
                9.40
             |                     
            
                1.52
             |                                 
            
                44,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/19/2013
             | 
            
                +0.30 / +3.33%
             |             
            
                9.00
             |           
            
                9.50
             |               
            
                9.00
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                1.50
             |                                 
            
                23,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                1.46
             |                                 
            
                16,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2013
             | 
            
                +0.20 / +2.27%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.80
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                1.46
             |                                 
            
                700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2013
             | 
            
                +0.20 / +2.33%
             |             
            
                8.60
             |           
            
                8.80
             |               
            
                8.60
             |                           
            
                8.80
             | 
            
                8.80
             |                     
            
                1.42
             |                                 
            
                8,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2013
             | 
            
                +0.30 / +3.61%
             |             
            
                8.40
             |           
            
                8.80
             |               
            
                8.40
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                1.39
             |                                 
            
                1,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2013
             | 
            
                -0.10 / -1.19%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.30
             |                     
            
                1.34
             |                                 
            
                25,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/4/2013
             | 
            
                +0.10 / +1.20%
             |             
            
                8.40
             |           
            
                8.40
             |               
            
                8.30
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                1.36
             |                                 
            
                12,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2013
             | 
            
                -0.10 / -1.19%
             |             
            
                8.50
             |           
            
                8.50
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.30
             |                     
            
                1.34
             |                                 
            
                7,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2013
             | 
            
                -0.10 / -1.18%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                8.40
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                1.36
             |                                 
            
                10,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                8.40
             |                           
            
                8.50
             | 
            
                8.50
             |                     
            
                1.37
             |                                 
            
                7,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.50
             |           
            
                8.50
             |               
            
                8.40
             |                           
            
                8.50
             | 
            
                8.50
             |                     
            
                1.37
             |                                 
            
                5,150
             |            
            
                 
             |                                       
         
    
        
            | 
                1/28/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.50
             |           
            
                8.80
             |               
            
                8.50
             |                           
            
                8.50
             | 
            
                8.50
             |                     
            
                1.37
             |                                 
            
                5,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                8.40
             |                           
            
                8.50
             | 
            
                8.50
             |                     
            
                1.37
             |                                 
            
                7,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/24/2013
             | 
            
                +0.20 / +2.41%
             |             
            
                8.30
             |           
            
                8.50
             |               
            
                8.30
             |                           
            
                8.50
             | 
            
                8.50
             |                     
            
                1.37
             |                                 
            
                11,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/23/2013
             | 
            
                -0.20 / -2.35%
             |             
            
                8.70
             |           
            
                8.70
             |               
            
                8.30
             |                           
            
                8.30
             | 
            
                8.30
             |                     
            
                1.34
             |                                 
            
                8,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2013
             | 
            
                -0.30 / -3.41%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.50
             |                           
            
                8.50
             | 
            
                8.50
             |                     
            
                1.37
             |                                 
            
                5,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |