| 
                 
                    Closing price on 3/22/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    6.60 | 
                 
                
                    | High | 
                    6.60 | 
                 
                
                    | Low | 
                    6.30 | 
                     
                
                    | Volume | 
                    159,907 | 
                                 
                
                    | Split-adjusted Price | 
                    6.30 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VKC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/22/2018
             | 
            
                -0.20 / -3.08%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.35
             |                     
            
                6.30
             |                                 
            
                159,907
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2018
             | 
            
                -0.20 / -2.99%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.40
             |                           
            
                6.50
             | 
            
                6.54
             |                     
            
                6.50
             |                                 
            
                178,269
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2018
             | 
            
                +0.20 / +3.08%
             |             
            
                6.60
             |           
            
                7.10
             |               
            
                6.60
             |                           
            
                6.70
             | 
            
                6.73
             |                     
            
                6.70
             |                                 
            
                149,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2018
             | 
            
                -0.50 / -7.14%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.72
             |                     
            
                6.50
             |                                 
            
                167,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2018
             | 
            
                0.00 / 0.00%
             |             
            
                6.90
             |           
            
                7.00
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                6.91
             |                     
            
                7.00
             |                                 
            
                6,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.10
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                7.00
             |                                 
            
                28,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                6.98
             |                     
            
                7.00
             |                                 
            
                44,938
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2018
             | 
            
                -0.20 / -2.78%
             |             
            
                7.00
             |           
            
                7.10
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                7.00
             |                                 
            
                37,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.10
             |           
            
                7.20
             |               
            
                7.00
             |                           
            
                7.20
             | 
            
                7.05
             |                     
            
                7.20
             |                                 
            
                98,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2018
             | 
            
                +0.20 / +2.86%
             |             
            
                7.00
             |           
            
                7.20
             |               
            
                7.00
             |                           
            
                7.20
             | 
            
                7.06
             |                     
            
                7.20
             |                                 
            
                22,702
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2018
             | 
            
                -0.20 / -2.78%
             |             
            
                7.10
             |           
            
                7.10
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.10
             |                     
            
                7.00
             |                                 
            
                24,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.00
             |                           
            
                7.20
             | 
            
                7.11
             |                     
            
                7.20
             |                                 
            
                126,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.10
             |           
            
                7.20
             |               
            
                7.10
             |                           
            
                7.20
             | 
            
                7.19
             |                     
            
                7.20
             |                                 
            
                36,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2018
             | 
            
                -0.10 / -1.37%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.10
             |                           
            
                7.20
             | 
            
                7.14
             |                     
            
                7.20
             |                                 
            
                21,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2018
             | 
            
                +0.10 / +1.39%
             |             
            
                7.20
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.30
             | 
            
                7.22
             |                     
            
                7.30
             |                                 
            
                55,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2018
             | 
            
                -0.10 / -1.37%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.10
             |                           
            
                7.20
             | 
            
                7.15
             |                     
            
                7.20
             |                                 
            
                140,053
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.20
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.30
             | 
            
                7.18
             |                     
            
                7.30
             |                                 
            
                65,400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                7.20
             |                           
            
                7.30
             | 
            
                7.21
             |                     
            
                7.30
             |                                 
            
                51,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.30
             | 
            
                7.21
             |                     
            
                7.30
             |                                 
            
                118,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2018
             | 
            
                -0.10 / -1.35%
             |             
            
                7.30
             |           
            
                7.40
             |               
            
                7.30
             |                           
            
                7.30
             | 
            
                7.33
             |                     
            
                7.30
             |                                 
            
                59,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2018
             | 
            
                +0.10 / +1.37%
             |             
            
                7.30
             |           
            
                7.40
             |               
            
                7.30
             |                           
            
                7.40
             | 
            
                7.30
             |                     
            
                7.40
             |                                 
            
                175,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.30
             |           
            
                7.50
             |               
            
                7.30
             |                           
            
                7.30
             | 
            
                7.42
             |                     
            
                7.30
             |                                 
            
                43,446
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/13/2018
             | 
            
                +0.10 / +1.39%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.30
             | 
            
                7.22
             |                     
            
                7.30
             |                                 
            
                62,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/12/2018
             | 
            
                +0.30 / +4.35%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.20
             | 
            
                7.21
             |                     
            
                7.20
             |                                 
            
                34,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/9/2018
             | 
            
                -0.20 / -2.82%
             |             
            
                7.00
             |           
            
                7.10
             |               
            
                6.80
             |                           
            
                6.90
             | 
            
                6.96
             |                     
            
                6.90
             |                                 
            
                116,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/8/2018
             | 
            
                -0.40 / -5.33%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.10
             | 
            
                7.16
             |                     
            
                7.10
             |                                 
            
                1,919,702
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/7/2018
             | 
            
                +0.50 / +7.14%
             |             
            
                7.00
             |           
            
                7.50
             |               
            
                7.00
             |                           
            
                7.50
             | 
            
                7.24
             |                     
            
                7.50
             |                                 
            
                115,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/6/2018
             | 
            
                -0.20 / -2.78%
             |             
            
                7.10
             |           
            
                7.20
             |               
            
                6.50
             |                           
            
                7.00
             | 
            
                6.72
             |                     
            
                7.00
             |                                 
            
                163,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/5/2018
             | 
            
                -0.30 / -4.00%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.39
             |                     
            
                7.20
             |                                 
            
                154,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/2/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.50
             |           
            
                7.70
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.57
             |                     
            
                7.50
             |                                 
            
                259,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |