| 
                 
                    Closing price on 6/1/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.90 | 
                 
                
                    | High | 
                    6.10 | 
                 
                
                    | Low | 
                    5.80 | 
                     
                
                    | Volume | 
                    112,100 | 
                                 
                
                    | Split-adjusted Price | 
                    3.06 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VKC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/1/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.90
             |           
            
                6.10
             |               
            
                5.80
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                3.06
             |                                 
            
                112,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/31/2012
             | 
            
                -0.30 / -4.84%
             |             
            
                6.10
             |           
            
                6.20
             |               
            
                5.80
             |                           
            
                5.90
             | 
            
                6.00
             |                     
            
                3.06
             |                                 
            
                114,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/30/2012
             | 
            
                -0.10 / -1.59%
             |             
            
                6.30
             |           
            
                6.40
             |               
            
                6.10
             |                           
            
                6.20
             | 
            
                6.22
             |                     
            
                3.22
             |                                 
            
                194,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/29/2012
             | 
            
                -0.10 / -1.56%
             |             
            
                6.40
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.30
             | 
            
                6.27
             |                     
            
                3.27
             |                                 
            
                127,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/28/2012
             | 
            
                +0.10 / +1.59%
             |             
            
                6.60
             |           
            
                6.70
             |               
            
                6.30
             |                           
            
                6.40
             | 
            
                6.56
             |                     
            
                3.32
             |                                 
            
                385,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2012
             | 
            
                +0.30 / +5.00%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.10
             |                           
            
                6.30
             | 
            
                6.25
             |                     
            
                3.27
             |                                 
            
                192,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2012
             | 
            
                +0.20 / +3.45%
             |             
            
                5.80
             |           
            
                6.00
             |               
            
                5.50
             |                           
            
                6.00
             | 
            
                5.80
             |                     
            
                3.11
             |                                 
            
                277,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2012
             | 
            
                -0.40 / -6.45%
             |             
            
                6.20
             |           
            
                6.20
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.85
             |                     
            
                3.01
             |                                 
            
                148,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/22/2012
             | 
            
                +0.20 / +3.33%
             |             
            
                6.20
             |           
            
                6.40
             |               
            
                6.00
             |                           
            
                6.20
             | 
            
                6.13
             |                     
            
                3.22
             |                                 
            
                373,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/21/2012
             | 
            
                +0.30 / +5.26%
             |             
            
                5.90
             |           
            
                6.00
             |               
            
                5.90
             |                           
            
                6.00
             | 
            
                5.98
             |                     
            
                3.11
             |                                 
            
                74,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2012
             | 
            
                -0.40 / -6.56%
             |             
            
                6.00
             |           
            
                6.10
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.82
             |                     
            
                2.96
             |                                 
            
                377,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2012
             | 
            
                -0.30 / -4.69%
             |             
            
                6.50
             |           
            
                6.60
             |               
            
                6.10
             |                           
            
                6.10
             | 
            
                6.35
             |                     
            
                3.16
             |                                 
            
                159,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2012
             | 
            
                +0.20 / +3.23%
             |             
            
                6.00
             |           
            
                6.40
             |               
            
                5.90
             |                           
            
                6.40
             | 
            
                6.17
             |                     
            
                3.32
             |                                 
            
                310,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/15/2012
             | 
            
                -0.40 / -6.06%
             |             
            
                6.60
             |           
            
                6.70
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.27
             |                     
            
                3.22
             |                                 
            
                609,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/14/2012
             | 
            
                -0.40 / -5.71%
             |             
            
                6.80
             |           
            
                7.00
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.68
             |                     
            
                3.42
             |                                 
            
                384,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2012
             | 
            
                -0.40 / -5.41%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.16
             |                     
            
                3.63
             |                                 
            
                374,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2012
             | 
            
                -0.60 / -7.50%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                7.30
             |                           
            
                7.40
             | 
            
                7.64
             |                     
            
                3.84
             |                                 
            
                333,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2012
             | 
            
                +0.30 / +3.90%
             |             
            
                7.40
             |           
            
                8.20
             |               
            
                7.30
             |                           
            
                8.00
             | 
            
                7.70
             |                     
            
                4.15
             |                                 
            
                492,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/8/2012
             | 
            
                -0.50 / -6.10%
             |             
            
                8.50
             |           
            
                8.50
             |               
            
                7.70
             |                           
            
                7.70
             | 
            
                7.89
             |                     
            
                3.99
             |                                 
            
                547,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2012
             | 
            
                +0.50 / +6.49%
             |             
            
                8.20
             |           
            
                8.20
             |               
            
                7.70
             |                           
            
                8.20
             | 
            
                8.10
             |                     
            
                4.25
             |                                 
            
                405,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2012
             | 
            
                +0.50 / +6.94%
             |             
            
                7.40
             |           
            
                7.70
             |               
            
                7.00
             |                           
            
                7.70
             | 
            
                7.46
             |                     
            
                3.99
             |                                 
            
                558,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/3/2012
             | 
            
                0.00 / 0.00%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                6.80
             |                           
            
                7.20
             | 
            
                7.07
             |                     
            
                3.74
             |                                 
            
                411,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/2/2012
             | 
            
                +0.40 / +5.88%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                6.80
             |                           
            
                7.20
             | 
            
                7.16
             |                     
            
                3.74
             |                                 
            
                763,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2012
             | 
            
                +0.50 / +7.94%
             |             
            
                6.30
             |           
            
                6.80
             |               
            
                6.30
             |                           
            
                6.80
             | 
            
                6.66
             |                     
            
                3.53
             |                                 
            
                575,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2012
             | 
            
                -0.40 / -5.97%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.42
             |                     
            
                3.27
             |                                 
            
                349,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2012
             | 
            
                +0.10 / +1.52%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.60
             |                           
            
                6.70
             | 
            
                6.79
             |                     
            
                3.48
             |                                 
            
                451,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2012
             | 
            
                +0.40 / +6.45%
             |             
            
                6.10
             |           
            
                6.60
             |               
            
                5.90
             |                           
            
                6.60
             | 
            
                6.37
             |                     
            
                3.42
             |                                 
            
                317,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.20
             |           
            
                6.40
             |               
            
                6.00
             |                           
            
                6.20
             | 
            
                6.26
             |                     
            
                3.22
             |                                 
            
                319,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2012
             | 
            
                -0.40 / -6.06%
             |             
            
                6.40
             |           
            
                6.60
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.27
             |                     
            
                3.22
             |                                 
            
                604,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2012
             | 
            
                -0.40 / -5.71%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.94
             |                     
            
                3.42
             |                                 
            
                1,370,100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |