| 
                 
                    Closing price on 3/15/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.20 | 
                 
                
                    | High | 
                    5.30 | 
                 
                
                    | Low | 
                    5.20 | 
                     
                
                    | Volume | 
                    8,790 | 
                                 
                
                    | Split-adjusted Price | 
                    1.85 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VTO Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/15/2013
             | 
            
                +0.10 / +1.92%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.20
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                1.85
             |                                 
            
                8,790
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2013
             | 
            
                0.00 / 0.00%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.81
             |                                 
            
                49,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2013
             | 
            
                0.00 / 0.00%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.81
             |                                 
            
                36,680
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2013
             | 
            
                -0.20 / -3.70%
             |             
            
                5.30
             |           
            
                5.50
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.81
             |                                 
            
                31,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/11/2013
             | 
            
                +0.30 / +5.88%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.10
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                1.88
             |                                 
            
                216,260
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2013
             | 
            
                0.00 / 0.00%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.78
             |                                 
            
                121,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2013
             | 
            
                -0.10 / -1.92%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.78
             |                                 
            
                15,530
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2013
             | 
            
                +0.20 / +4.00%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.81
             |                                 
            
                50,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2013
             | 
            
                -0.10 / -1.96%
             |             
            
                5.00
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.75
             |                                 
            
                920,670
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2013
             | 
            
                -0.30 / -5.56%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.78
             |                                 
            
                268,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2013
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.40
             |               
            
                5.20
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                1.88
             |                                 
            
                73,750
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2013
             | 
            
                +0.10 / +1.89%
             |             
            
                5.30
             |           
            
                5.50
             |               
            
                5.20
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                1.88
             |                                 
            
                95,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2013
             | 
            
                +0.10 / +1.92%
             |             
            
                5.00
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                1.85
             |                                 
            
                217,760
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2013
             | 
            
                -0.30 / -5.45%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.81
             |                                 
            
                626,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2013
             | 
            
                -0.40 / -6.78%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                1.92
             |                                 
            
                197,080
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2013
             | 
            
                +0.30 / +5.36%
             |             
            
                5.60
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                2.06
             |                                 
            
                954,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2013
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.60
             |                           
            
                5.60
             | 
            
                5.60
             |                     
            
                1.95
             |                                 
            
                1,204,790
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2013
             | 
            
                +0.30 / +5.66%
             |             
            
                5.30
             |           
            
                5.60
             |               
            
                5.20
             |                           
            
                5.60
             | 
            
                5.60
             |                     
            
                1.95
             |                                 
            
                916,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/19/2013
             | 
            
                +0.10 / +1.92%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.20
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                1.85
             |                                 
            
                432,660
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2013
             | 
            
                +0.10 / +1.96%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.81
             |                                 
            
                162,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2013
             | 
            
                +0.20 / +4.08%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.78
             |                                 
            
                61,460
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2013
             | 
            
                0.00 / 0.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.71
             |                                 
            
                102,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2013
             | 
            
                +0.20 / +4.26%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.71
             |                                 
            
                67,380
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2013
             | 
            
                -0.20 / -4.08%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.64
             |                                 
            
                49,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/4/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.71
             |                                 
            
                32,810
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                4.90
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.71
             |                                 
            
                32,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.71
             |                                 
            
                80,950
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.20
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.71
             |                                 
            
                225,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.80
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.71
             |                                 
            
                167,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/28/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.10
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.71
             |                                 
            
                403,180
             |  
            
                 
             |                                                              
             
    
         
    
    
 |