| 
                 
                    Closing price on 5/6/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    9.20 | 
                 
                
                    | High | 
                    9.40 | 
                 
                
                    | Low | 
                    9.10 | 
                     
                
                    | Volume | 
                    13,600 | 
                                 
                
                    | Split-adjusted Price | 
                    9.20 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
V15 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/6/2011
             | 
            
                +0.10 / +1.10%
             |             
            
                9.20
             |           
            
                9.40
             |               
            
                9.10
             |                           
            
                9.20
             | 
            
                9.10
             |                     
            
                9.20
             |                                 
            
                13,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2011
             | 
            
                -0.10 / -1.09%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.10
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                9.10
             |                                 
            
                12,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.20
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                9.20
             |                                 
            
                21,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/29/2011
             | 
            
                -0.10 / -1.08%
             |             
            
                9.20
             |           
            
                9.60
             |               
            
                9.20
             |                           
            
                9.20
             | 
            
                9.30
             |                     
            
                9.20
             |                                 
            
                18,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2011
             | 
            
                -0.20 / -2.11%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                9.30
             |                                 
            
                19,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2011
             | 
            
                +0.20 / +2.15%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.10
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                9.50
             |                                 
            
                23,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2011
             | 
            
                -0.50 / -5.10%
             |             
            
                9.70
             |           
            
                9.70
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                9.30
             |                                 
            
                50,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2011
             | 
            
                +0.30 / +3.16%
             |             
            
                9.40
             |           
            
                9.80
             |               
            
                9.40
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                9.80
             |                                 
            
                50,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.60
             |           
            
                9.60
             |               
            
                9.00
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                9.50
             |                                 
            
                19,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.50
             |           
            
                9.60
             |               
            
                9.40
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                9.50
             |                                 
            
                19,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2011
             | 
            
                -0.50 / -5.00%
             |             
            
                9.30
             |           
            
                10.20
             |               
            
                9.30
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                9.50
             |                                 
            
                39,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2011
             | 
            
                -0.20 / -1.96%
             |             
            
                10.00
             |           
            
                10.30
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                10.00
             |                                 
            
                20,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2011
             | 
            
                -0.50 / -4.67%
             |             
            
                10.60
             |           
            
                10.60
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                10.20
             |                                 
            
                30,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2011
             | 
            
                -0.30 / -2.73%
             |             
            
                10.60
             |           
            
                11.10
             |               
            
                10.60
             |                           
            
                10.70
             | 
            
                11.00
             |                     
            
                10.70
             |                                 
            
                36,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2011
             | 
            
                -0.30 / -2.65%
             |             
            
                11.60
             |           
            
                11.60
             |               
            
                11.00
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                11.00
             |                                 
            
                29,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2011
             | 
            
                -0.30 / -2.59%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.20
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                11.30
             |                                 
            
                35,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2011
             | 
            
                -0.30 / -2.52%
             |             
            
                11.40
             |           
            
                11.80
             |               
            
                11.40
             |                           
            
                11.60
             | 
            
                11.55
             |                     
            
                11.60
             |                                 
            
                35,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2011
             | 
            
                -0.20 / -1.65%
             |             
            
                11.90
             |           
            
                12.10
             |               
            
                11.80
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                11.90
             |                                 
            
                42,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2011
             | 
            
                +0.50 / +4.31%
             |             
            
                11.80
             |           
            
                12.20
             |               
            
                11.80
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                12.10
             |                                 
            
                42,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.60
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                11.60
             |                                 
            
                15,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2011
             | 
            
                -0.20 / -1.69%
             |             
            
                11.50
             |           
            
                11.80
             |               
            
                11.30
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                11.60
             |                                 
            
                34,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2011
             | 
            
                -0.10 / -0.84%
             |             
            
                11.90
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.90
             |                     
            
                11.80
             |                                 
            
                27,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2011
             | 
            
                -0.10 / -0.83%
             |             
            
                12.00
             |           
            
                12.50
             |               
            
                11.80
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                11.90
             |                                 
            
                38,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.80
             |           
            
                12.10
             |               
            
                11.60
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                12.00
             |                                 
            
                39,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2011
             | 
            
                -0.30 / -2.44%
             |             
            
                12.40
             |           
            
                12.40
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                12.00
             |                                 
            
                21,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2011
             | 
            
                -0.50 / -3.91%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.30
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                12.30
             |                                 
            
                33,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/25/2011
             | 
            
                +0.30 / +2.40%
             |             
            
                12.50
             |           
            
                13.20
             |               
            
                12.40
             |                           
            
                12.80
             | 
            
                12.50
             |                     
            
                12.80
             |                                 
            
                101,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2011
             | 
            
                -0.90 / -6.72%
             |             
            
                13.10
             |           
            
                13.10
             |               
            
                12.30
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                12.50
             |                                 
            
                184,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2011
             | 
            
                +0.30 / +2.29%
             |             
            
                13.10
             |           
            
                13.50
             |               
            
                13.00
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                13.40
             |                                 
            
                30,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2011
             | 
            
                -0.50 / -3.68%
             |             
            
                13.50
             |           
            
                13.70
             |               
            
                13.00
             |                           
            
                13.10
             | 
            
                13.10
             |                     
            
                13.10
             |                                 
            
                39,200
             |  
            
                 
             |                                                              
             
    
         
    
    
 |