| 
    
        
            | 
                    Closing price on 4/20/2012
                 |  |  
    
        |           
                
                    | Open | 5.70 |  
                    | High | 5.90 |  
                    | Low | 5.50 |  
                    | Volume | 147,100 |  
                    | Split-adjusted Price | 5.70 |  
                
             | 
 |  V15 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  			
            | 4/6/2012 | 0.00 / 0.00% | 5.10 | 5.20 | 5.00 | 5.00 | 5.00 | 5.00 | 99,800 |   |  
            | 4/5/2012 | +0.10 / +2.04% | 5.00 | 5.10 | 4.90 | 5.00 | 5.00 | 5.00 | 96,200 |   |  			
            | 4/4/2012 | -0.20 / -3.92% | 5.20 | 5.20 | 4.80 | 4.90 | 4.90 | 4.90 | 87,500 |   |  
            | 4/3/2012 | +0.10 / +2.00% | 4.80 | 5.20 | 4.70 | 5.10 | 5.10 | 5.10 | 268,700 |   |  			
            | 3/30/2012 | -0.30 / -5.66% | 5.10 | 5.20 | 5.00 | 5.00 | 5.08 | 5.00 | 171,200 |   |  
            | 3/29/2012 | -0.30 / -5.36% | 5.40 | 5.60 | 5.30 | 5.30 | 5.30 | 5.30 | 178,600 |   |  			
            | 3/28/2012 | 0.00 / 0.00% | 5.60 | 5.60 | 5.30 | 5.60 | 5.60 | 5.60 | 242,500 |   |  
            | 3/27/2012 | 0.00 / 0.00% | 5.90 | 5.90 | 5.60 | 5.60 | 5.60 | 5.60 | 352,500 |   |  			
            | 3/26/2012 | +0.20 / +3.70% | 5.60 | 5.60 | 5.60 | 5.60 | 5.60 | 5.60 | 265,100 |   |  
            | 3/23/2012 | +0.30 / +5.88% | 5.00 | 5.40 | 5.00 | 5.40 | 5.10 | 5.40 | 270,600 |   |  			
            | 3/22/2012 | +0.10 / +2.00% | 5.10 | 5.20 | 5.00 | 5.10 | 5.10 | 5.10 | 185,300 |   |  
            | 3/21/2012 | 0.00 / 0.00% | 5.00 | 5.30 | 5.00 | 5.00 | 5.00 | 5.00 | 145,100 |   |  			
            | 3/20/2012 | +0.20 / +4.17% | 5.00 | 5.00 | 4.90 | 5.00 | 5.00 | 5.00 | 94,000 |   |  
            | 3/19/2012 | -0.20 / -4.00% | 5.00 | 5.10 | 4.80 | 4.80 | 4.80 | 4.80 | 75,700 |   |  			
            | 3/16/2012 | +0.10 / +2.04% | 5.00 | 5.00 | 4.90 | 5.00 | 4.90 | 5.00 | 189,000 |   |  
            | 3/15/2012 | +0.30 / +6.52% | 4.50 | 4.90 | 4.40 | 4.90 | 4.90 | 4.90 | 203,200 |   |  			
            | 3/14/2012 | -0.30 / -6.12% | 4.90 | 4.90 | 4.60 | 4.60 | 4.60 | 4.60 | 73,100 |   |  
            | 3/13/2012 | +0.10 / +2.08% | 4.90 | 4.90 | 4.70 | 4.90 | 4.90 | 4.90 | 50,100 |   |  			
            | 3/12/2012 | -0.30 / -5.88% | 5.10 | 5.10 | 4.80 | 4.80 | 4.80 | 4.80 | 151,800 |   |  
            | 3/9/2012 | 0.00 / 0.00% | 5.20 | 5.40 | 5.00 | 5.10 | 5.10 | 5.10 | 217,800 |   |  |