| 
                 
                    Closing price on 7/19/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    7.60 | 
                 
                
                    | High | 
                    8.00 | 
                 
                
                    | Low | 
                    7.60 | 
                     
                
                    | Volume | 
                    99,300 | 
                                 
                
                    | Split-adjusted Price | 
                    3.34 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VKC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/19/2011
             | 
            
                +0.10 / +1.33%
             |             
            
                7.60
             |           
            
                8.00
             |               
            
                7.60
             |                           
            
                7.60
             | 
            
                7.93
             |                     
            
                3.34
             |                                 
            
                99,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                8.05
             |                     
            
                3.29
             |                                 
            
                115,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2011
             | 
            
                +0.10 / +1.35%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.97
             |                     
            
                3.29
             |                                 
            
                89,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                8.30
             |           
            
                8.40
             |               
            
                7.40
             |                           
            
                7.40
             | 
            
                7.99
             |                     
            
                3.25
             |                                 
            
                118,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2011
             | 
            
                -0.10 / -1.33%
             |             
            
                7.40
             |           
            
                8.40
             |               
            
                7.40
             |                           
            
                7.40
             | 
            
                7.92
             |                     
            
                3.25
             |                                 
            
                126,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2011
             | 
            
                -0.30 / -3.85%
             |             
            
                8.50
             |           
            
                8.50
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.91
             |                     
            
                3.29
             |                                 
            
                137,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2011
             | 
            
                -0.40 / -4.88%
             |             
            
                7.80
             |           
            
                8.20
             |               
            
                7.80
             |                           
            
                7.80
             | 
            
                8.02
             |                     
            
                3.42
             |                                 
            
                71,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2011
             | 
            
                -0.60 / -6.82%
             |             
            
                8.80
             |           
            
                8.80
             |               
            
                8.20
             |                           
            
                8.20
             | 
            
                8.27
             |                     
            
                3.60
             |                                 
            
                98,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2011
             | 
            
                -0.30 / -3.30%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                8.60
             |                           
            
                8.80
             | 
            
                8.77
             |                     
            
                3.86
             |                                 
            
                291,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2011
             | 
            
                -0.50 / -5.21%
             |             
            
                9.00
             |           
            
                9.60
             |               
            
                9.00
             |                           
            
                9.10
             | 
            
                9.23
             |                     
            
                3.99
             |                                 
            
                307,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.60
             |           
            
                9.70
             |               
            
                9.50
             |                           
            
                9.60
             | 
            
                9.58
             |                     
            
                4.21
             |                                 
            
                331,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2011
             | 
            
                +0.20 / +2.13%
             |             
            
                9.40
             |           
            
                9.70
             |               
            
                9.20
             |                           
            
                9.60
             | 
            
                9.47
             |                     
            
                4.21
             |                                 
            
                244,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2011
             | 
            
                +0.20 / +2.17%
             |             
            
                9.00
             |           
            
                9.60
             |               
            
                8.90
             |                           
            
                9.40
             | 
            
                9.26
             |                     
            
                4.13
             |                                 
            
                470,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2011
             | 
            
                -0.10 / -1.08%
             |             
            
                8.70
             |           
            
                9.30
             |               
            
                8.70
             |                           
            
                9.20
             | 
            
                8.97
             |                     
            
                4.04
             |                                 
            
                459,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2011
             | 
            
                -0.60 / -6.06%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                4.08
             |                                 
            
                8,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2011
             | 
            
                -0.70 / -6.60%
             |             
            
                9.90
             |           
            
                9.90
             |               
            
                9.90
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                4.35
             |                                 
            
                23,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2011
             | 
            
                -0.40 / -3.64%
             |             
            
                10.60
             |           
            
                10.60
             |               
            
                10.60
             |                           
            
                10.60
             | 
            
                10.60
             |                     
            
                4.65
             |                                 
            
                204,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2011
             | 
            
                -0.40 / -3.51%
             |             
            
                11.60
             |           
            
                11.60
             |               
            
                11.00
             |                           
            
                11.00
             | 
            
                11.31
             |                     
            
                4.83
             |                                 
            
                106,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2011
             | 
            
                -0.20 / -1.72%
             |             
            
                11.70
             |           
            
                11.90
             |               
            
                11.20
             |                           
            
                11.40
             | 
            
                11.81
             |                     
            
                5.00
             |                                 
            
                46,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2011
             | 
            
                +0.50 / +4.50%
             |             
            
                11.60
             |           
            
                11.90
             |               
            
                11.20
             |                           
            
                11.60
             | 
            
                11.72
             |                     
            
                5.09
             |                                 
            
                96,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2011
             | 
            
                -0.60 / -5.13%
             |             
            
                11.80
             |           
            
                12.20
             |               
            
                11.00
             |                           
            
                11.10
             | 
            
                11.56
             |                     
            
                4.87
             |                                 
            
                178,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2011
             | 
            
                -0.60 / -4.88%
             |             
            
                12.30
             |           
            
                12.30
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.79
             |                     
            
                5.14
             |                                 
            
                115,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2011
             | 
            
                -0.40 / -3.15%
             |             
            
                12.90
             |           
            
                12.90
             |               
            
                12.30
             |                           
            
                12.30
             | 
            
                12.53
             |                     
            
                5.40
             |                                 
            
                83,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2011
             | 
            
                -0.70 / -5.22%
             |             
            
                13.50
             |           
            
                13.60
             |               
            
                12.60
             |                           
            
                12.70
             | 
            
                13.23
             |                     
            
                5.58
             |                                 
            
                111,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2011
             | 
            
                -0.30 / -2.19%
             |             
            
                13.70
             |           
            
                13.90
             |               
            
                13.00
             |                           
            
                13.40
             | 
            
                13.47
             |                     
            
                5.88
             |                                 
            
                152,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2011
             | 
            
                -0.40 / -2.84%
             |             
            
                14.10
             |           
            
                14.20
             |               
            
                13.60
             |                           
            
                13.70
             | 
            
                13.95
             |                     
            
                6.01
             |                                 
            
                123,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2011
             | 
            
                +0.70 / +5.22%
             |             
            
                13.70
             |           
            
                14.20
             |               
            
                13.60
             |                           
            
                14.10
             | 
            
                13.92
             |                     
            
                6.19
             |                                 
            
                199,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2011
             | 
            
                +0.40 / +3.08%
             |             
            
                13.40
             |           
            
                13.80
             |               
            
                13.20
             |                           
            
                13.40
             | 
            
                13.46
             |                     
            
                5.88
             |                                 
            
                134,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2011
             | 
            
                +0.20 / +1.56%
             |             
            
                13.00
             |           
            
                13.30
             |               
            
                12.60
             |                           
            
                13.00
             | 
            
                13.17
             |                     
            
                5.71
             |                                 
            
                73,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2011
             | 
            
                -0.80 / -5.88%
             |             
            
                13.70
             |           
            
                13.80
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                13.48
             |                     
            
                5.62
             |                                 
            
                171,800
             |  
            
                 
             |                                                              
             
    
         
    
    
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