| 
                 
                    Closing price on 3/22/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.20 | 
                 
                
                    | High | 
                    5.30 | 
                 
                
                    | Low | 
                    5.00 | 
                     
                
                    | Volume | 
                    159,920 | 
                                 
                
                    | Split-adjusted Price | 
                    1.63 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VTO Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/22/2012
             | 
            
                -0.10 / -1.92%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.63
             |                                 
            
                159,920
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2012
             | 
            
                +0.10 / +1.96%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.66
             |                                 
            
                270,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2012
             | 
            
                +0.10 / +2.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.63
             |                                 
            
                157,590
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2012
             | 
            
                -0.10 / -1.96%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.60
             |                                 
            
                133,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2012
             | 
            
                +0.20 / +4.08%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.63
             |                                 
            
                655,950
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2012
             | 
            
                +0.20 / +4.26%
             |             
            
                4.70
             |           
            
                4.90
             |               
            
                4.60
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.57
             |                                 
            
                153,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2012
             | 
            
                -0.10 / -2.08%
             |             
            
                4.80
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.50
             |                                 
            
                215,350
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2012
             | 
            
                +0.20 / +4.35%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.53
             |                                 
            
                58,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2012
             | 
            
                -0.20 / -4.17%
             |             
            
                4.80
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.47
             |                                 
            
                255,650
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2012
             | 
            
                -0.10 / -2.04%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.53
             |                                 
            
                102,470
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2012
             | 
            
                -0.20 / -3.92%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.57
             |                                 
            
                277,540
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2012
             | 
            
                +0.20 / +4.08%
             |             
            
                4.90
             |           
            
                5.10
             |               
            
                4.80
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.63
             |                                 
            
                322,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2012
             | 
            
                -0.20 / -3.92%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.57
             |                                 
            
                618,020
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2012
             | 
            
                +0.20 / +4.08%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.63
             |                                 
            
                195,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2012
             | 
            
                +0.10 / +2.08%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.57
             |                                 
            
                204,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.53
             |                                 
            
                169,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/29/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.80
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.53
             |                                 
            
                180,960
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.53
             |                                 
            
                428,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2012
             | 
            
                +0.20 / +4.35%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.53
             |                                 
            
                473,580
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2012
             | 
            
                +0.10 / +2.22%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.40
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.47
             |                                 
            
                387,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/23/2012
             | 
            
                +0.20 / +4.65%
             |             
            
                4.30
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.44
             |                                 
            
                184,920
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.37
             |                                 
            
                159,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.37
             |                                 
            
                265,250
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2012
             | 
            
                +0.10 / +2.38%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.37
             |                                 
            
                145,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2012
             | 
            
                -0.10 / -2.33%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.34
             |                                 
            
                43,840
             |            
            
                 
             |                                       
         
    
        
            | 
                2/16/2012
             | 
            
                +0.10 / +2.38%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.37
             |                                 
            
                20,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/15/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.20
             |           
            
                4.20
             |               
            
                4.10
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.34
             |                                 
            
                128,310
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.10
             |           
            
                4.30
             |               
            
                4.10
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.34
             |                                 
            
                33,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/13/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.20
             |           
            
                4.30
             |               
            
                4.10
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.34
             |                                 
            
                38,610
             |            
            
                 
             |                                       
         
    
        
            | 
                2/10/2012
             | 
            
                -0.20 / -4.55%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.34
             |                                 
            
                76,450
             |  
            
                 
             |                                                              
             
    
         
    
    
 |