| 
                 
                    Closing price on 3/25/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    44.30 | 
                 
                
                    | High | 
                    44.80 | 
                 
                
                    | Low | 
                    42.00 | 
                     
                
                    | Volume | 
                    1,200 | 
                                 
                
                    | Split-adjusted Price | 
                    42.80 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VTS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/25/2011
             | 
            
                -0.20 / -0.47%
             |             
            
                44.30
             |           
            
                44.80
             |               
            
                42.00
             |                           
            
                42.80
             | 
            
                42.80
             |                     
            
                42.80
             |                                 
            
                1,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2011
             | 
            
                0.00 / 0.00%
             |             
            
                44.90
             |           
            
                44.90
             |               
            
                43.00
             |                           
            
                43.00
             | 
            
                43.00
             |                     
            
                43.00
             |                                 
            
                1,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2011
             | 
            
                +0.50 / +1.18%
             |             
            
                44.90
             |           
            
                44.90
             |               
            
                43.00
             |                           
            
                43.00
             | 
            
                43.00
             |                     
            
                43.00
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2011
             | 
            
                +0.50 / +1.19%
             |             
            
                43.90
             |           
            
                43.90
             |               
            
                42.50
             |                           
            
                42.50
             | 
            
                42.50
             |                     
            
                42.50
             |                                 
            
                900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2011
             | 
            
                +0.70 / +1.69%
             |             
            
                44.10
             |           
            
                44.10
             |               
            
                42.00
             |                           
            
                42.00
             | 
            
                42.00
             |                     
            
                42.00
             |                                 
            
                1,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2011
             | 
            
                -1.70 / -3.95%
             |             
            
                42.00
             |           
            
                42.00
             |               
            
                41.30
             |                           
            
                41.30
             | 
            
                41.30
             |                     
            
                41.30
             |                                 
            
                3,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/17/2011
             | 
            
                +0.10 / +0.23%
             |             
            
                44.90
             |           
            
                44.90
             |               
            
                43.00
             |                           
            
                43.00
             | 
            
                43.00
             |                     
            
                43.00
             |                                 
            
                400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2011
             | 
            
                -0.10 / -0.23%
             |             
            
                41.60
             |           
            
                42.90
             |               
            
                41.60
             |                           
            
                42.90
             | 
            
                42.90
             |                     
            
                42.90
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2011
             | 
            
                -1.70 / -3.80%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                43.00
             |                           
            
                43.00
             | 
            
                43.00
             |                     
            
                43.00
             |                                 
            
                1,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2011
             | 
            
                +1.10 / +2.52%
             |             
            
                44.70
             |           
            
                44.70
             |               
            
                44.70
             |                           
            
                44.70
             | 
            
                44.70
             |                     
            
                44.70
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/11/2011
             | 
            
                -0.90 / -2.02%
             |             
            
                45.90
             |           
            
                45.90
             |               
            
                43.60
             |                           
            
                43.60
             | 
            
                43.60
             |                     
            
                43.60
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/10/2011
             | 
            
                -1.90 / -4.09%
             |             
            
                43.20
             |           
            
                44.50
             |               
            
                43.20
             |                           
            
                44.50
             | 
            
                44.50
             |                     
            
                44.50
             |                                 
            
                1,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/9/2011
             | 
            
                +2.90 / +6.67%
             |             
            
                46.40
             |           
            
                46.40
             |               
            
                46.40
             |                           
            
                46.40
             | 
            
                46.40
             |                     
            
                46.40
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2011
             | 
            
                -3.00 / -6.45%
             |             
            
                43.50
             |           
            
                43.50
             |               
            
                43.50
             |                           
            
                43.50
             | 
            
                43.50
             |                     
            
                43.50
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2011
             | 
            
                0.00 / 0.00%
             |             
            
                46.50
             |           
            
                46.50
             |               
            
                46.50
             |                           
            
                46.50
             | 
            
                46.50
             |                     
            
                46.50
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                46.50
             |           
            
                46.50
             |               
            
                46.50
             |                           
            
                46.50
             | 
            
                46.50
             |                     
            
                46.50
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/3/2011
             | 
            
                +1.20 / +2.65%
             |             
            
                46.50
             |           
            
                46.50
             |               
            
                46.50
             |                           
            
                46.50
             | 
            
                46.50
             |                     
            
                46.50
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2011
             | 
            
                +0.30 / +0.67%
             |             
            
                42.90
             |           
            
                45.30
             |               
            
                42.90
             |                           
            
                45.30
             | 
            
                45.30
             |                     
            
                45.30
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2011
             | 
            
                -2.90 / -6.05%
             |             
            
                48.40
             |           
            
                48.40
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                45.00
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2011
             | 
            
                +1.30 / +2.79%
             |             
            
                47.90
             |           
            
                47.90
             |               
            
                47.90
             |                           
            
                47.90
             | 
            
                47.90
             |                     
            
                47.90
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2011
             | 
            
                +1.60 / +3.56%
             |             
            
                46.80
             |           
            
                46.80
             |               
            
                46.50
             |                           
            
                46.60
             | 
            
                46.60
             |                     
            
                46.60
             |                                 
            
                1,400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2011
             | 
            
                -0.50 / -1.10%
             |             
            
                46.90
             |           
            
                46.90
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                45.00
             |                                 
            
                1,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/23/2011
             | 
            
                +0.90 / +2.02%
             |             
            
                46.40
             |           
            
                46.40
             |               
            
                45.40
             |                           
            
                45.50
             | 
            
                45.50
             |                     
            
                45.50
             |                                 
            
                1,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2011
             | 
            
                +1.10 / +2.53%
             |             
            
                46.40
             |           
            
                46.40
             |               
            
                44.60
             |                           
            
                44.60
             | 
            
                44.60
             |                     
            
                44.60
             |                                 
            
                400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2011
             | 
            
                -3.00 / -6.45%
             |             
            
                48.50
             |           
            
                48.70
             |               
            
                43.50
             |                           
            
                43.50
             | 
            
                43.50
             |                     
            
                43.50
             |                                 
            
                3,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2011
             | 
            
                +2.20 / +4.97%
             |             
            
                47.30
             |           
            
                47.30
             |               
            
                46.50
             |                           
            
                46.50
             | 
            
                46.50
             |                     
            
                46.50
             |                                 
            
                400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2011
             | 
            
                +0.30 / +0.68%
             |             
            
                47.70
             |           
            
                47.70
             |               
            
                44.30
             |                           
            
                44.30
             | 
            
                44.30
             |                     
            
                44.30
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/16/2011
             | 
            
                -0.70 / -1.57%
             |             
            
                46.70
             |           
            
                46.70
             |               
            
                44.00
             |                           
            
                44.00
             | 
            
                44.00
             |                     
            
                44.00
             |                                 
            
                3,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/15/2011
             | 
            
                -2.30 / -4.89%
             |             
            
                47.00
             |           
            
                47.00
             |               
            
                44.60
             |                           
            
                44.70
             | 
            
                44.70
             |                     
            
                44.70
             |                                 
            
                25,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                47.10
             |           
            
                47.10
             |               
            
                47.00
             |                           
            
                47.00
             | 
            
                47.00
             |                     
            
                47.00
             |                                 
            
                1,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |