| 
    
        
            | 
                    Closing price on 5/12/2011
                 |  |  
    
        |           
                
                    | Open | 9.20 |  
                    | High | 9.20 |  
                    | Low | 9.20 |  
                    | Volume | 0 |  
                    | Split-adjusted Price | 9.20 |  
                
             | 
 |  V15 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/12/2011 | +0.10 / +1.10% | 9.20 | 9.20 | 9.20 | 9.20 | 9.20 | 9.20 | 0 |   |  
            | 5/11/2011 | -0.20 / -2.15% | 9.50 | 9.50 | 9.10 | 9.10 | 9.10 | 9.10 | 5,600 |   |  			
            | 5/10/2011 | 0.00 / 0.00% | 9.30 | 9.40 | 9.20 | 9.30 | 9.30 | 9.30 | 13,700 |   |  
            | 5/9/2011 | +0.10 / +1.09% | 9.20 | 9.40 | 9.20 | 9.30 | 9.30 | 9.30 | 5,400 |   |  			
            | 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 |   |  |