| 
                 
                    Closing price on 5/22/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.40 | 
                 
                
                    | High | 
                    5.50 | 
                 
                
                    | Low | 
                    5.30 | 
                     
                
                    | Volume | 
                    105,100 | 
                                 
                
                    | Split-adjusted Price | 
                    5.50 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
V15 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/22/2012
             | 
            
                +0.30 / +5.77%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.30
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                5.50
             |                                 
            
                105,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/21/2012
             | 
            
                +0.20 / +4.00%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                5.20
             |                                 
            
                15,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2012
             | 
            
                -0.30 / -5.66%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                5.00
             |                                 
            
                99,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2012
             | 
            
                -0.30 / -5.36%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.30
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                5.30
             |                                 
            
                55,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2012
             | 
            
                +0.20 / +3.70%
             |             
            
                5.40
             |           
            
                5.60
             |               
            
                5.40
             |                           
            
                5.60
             | 
            
                5.60
             |                     
            
                5.60
             |                                 
            
                93,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/15/2012
             | 
            
                -0.40 / -6.90%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                5.40
             |                                 
            
                241,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/14/2012
             | 
            
                -0.40 / -6.45%
             |             
            
                6.00
             |           
            
                6.30
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                5.80
             |                                 
            
                134,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2012
             | 
            
                -0.50 / -7.46%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.40
             |                     
            
                6.20
             |                                 
            
                259,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2012
             | 
            
                -0.10 / -1.47%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.50
             |                           
            
                6.70
             | 
            
                6.70
             |                     
            
                6.70
             |                                 
            
                128,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2012
             | 
            
                +0.30 / +4.62%
             |             
            
                6.30
             |           
            
                6.80
             |               
            
                6.30
             |                           
            
                6.80
             | 
            
                6.80
             |                     
            
                6.80
             |                                 
            
                146,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/8/2012
             | 
            
                -0.20 / -2.99%
             |             
            
                6.80
             |           
            
                6.90
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                6.50
             |                                 
            
                283,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2012
             | 
            
                +0.40 / +6.35%
             |             
            
                6.50
             |           
            
                6.70
             |               
            
                6.50
             |                           
            
                6.70
             | 
            
                6.70
             |                     
            
                6.70
             |                                 
            
                249,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.20
             |           
            
                6.40
             |               
            
                6.10
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                6.30
             |                                 
            
                157,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/3/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.20
             |           
            
                6.30
             |               
            
                6.00
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                6.30
             |                                 
            
                187,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/2/2012
             | 
            
                +0.40 / +6.78%
             |             
            
                6.00
             |           
            
                6.30
             |               
            
                6.00
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                6.30
             |                                 
            
                622,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2012
             | 
            
                +0.10 / +1.72%
             |             
            
                5.60
             |           
            
                5.90
             |               
            
                5.60
             |                           
            
                5.90
             | 
            
                5.80
             |                     
            
                5.90
             |                                 
            
                142,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2012
             | 
            
                +0.10 / +1.75%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                5.60
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                5.80
             |                                 
            
                58,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2012
             | 
            
                +0.20 / +3.64%
             |             
            
                5.70
             |           
            
                5.80
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                195,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2012
             | 
            
                -0.20 / -3.51%
             |             
            
                5.60
             |           
            
                5.80
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                5.50
             |                                 
            
                169,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                224,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.70
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                147,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2012
             | 
            
                -0.30 / -5.00%
             |             
            
                6.10
             |           
            
                6.20
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                176,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2012
             | 
            
                +0.30 / +5.26%
             |             
            
                5.70
             |           
            
                6.20
             |               
            
                5.70
             |                           
            
                6.00
             | 
            
                6.00
             |                     
            
                6.00
             |                                 
            
                508,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.70
             |           
            
                5.80
             |               
            
                5.50
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                306,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2012
             | 
            
                +0.20 / +3.64%
             |             
            
                5.50
             |           
            
                5.80
             |               
            
                5.40
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                148,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2012
             | 
            
                -0.20 / -3.51%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.70
             |                     
            
                5.50
             |                                 
            
                146,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2012
             | 
            
                +0.30 / +5.56%
             |             
            
                5.60
             |           
            
                5.70
             |               
            
                5.60
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                441,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2012
             | 
            
                +0.40 / +8.00%
             |             
            
                5.20
             |           
            
                5.40
             |               
            
                5.00
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                5.40
             |                                 
            
                324,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2012
             | 
            
                -0.10 / -1.96%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                5.00
             |                                 
            
                52,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2012
             | 
            
                +0.10 / +2.00%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                4.90
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                5.10
             |                                 
            
                137,800
             |  
            
                 
             |                                                              
             
    
         
    
    
 |