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                    Closing price on 8/3/2011
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                    | Open | 5.10 |  
                    | High | 5.20 |  
                    | Low | 4.90 |  
                    | Volume | 12,900 |  
                    | Split-adjusted Price | 5.20 |  
                
             | 
 |  V15 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 8/3/2011 | +0.30 / +6.12% | 5.10 | 5.20 | 4.90 | 5.20 | 5.20 | 5.20 | 12,900 |   |  
            | 8/2/2011 | -0.30 / -5.77% | 5.20 | 5.20 | 4.90 | 4.90 | 4.90 | 4.90 | 91,400 |   |  			
            | 8/1/2011 | -0.40 / -7.14% | 5.50 | 5.60 | 5.20 | 5.20 | 5.20 | 5.20 | 143,800 |   |  
            | 7/29/2011 | 0.00 / 0.00% | 5.80 | 5.80 | 5.40 | 5.60 | 5.60 | 5.60 | 53,200 |   |  			
            | 7/28/2011 | 0.00 / 0.00% | 5.60 | 5.80 | 5.60 | 5.60 | 5.60 | 5.60 | 54,200 |   |  
            | 7/27/2011 | 0.00 / 0.00% | 5.60 | 5.60 | 5.50 | 5.60 | 5.60 | 5.60 | 17,900 |   |  			
            | 7/26/2011 | -0.20 / -3.45% | 5.80 | 6.00 | 5.50 | 5.60 | 5.60 | 5.60 | 25,700 |   |  
            | 7/25/2011 | -0.50 / -7.94% | 6.00 | 6.00 | 5.80 | 5.80 | 5.80 | 5.80 | 68,000 |   |  			
            | 7/22/2011 | +0.10 / +1.61% | 6.40 | 6.40 | 5.90 | 6.30 | 6.20 | 6.30 | 56,000 |   |  
            | 7/21/2011 | -0.30 / -4.62% | 6.60 | 6.60 | 6.20 | 6.20 | 6.20 | 6.20 | 56,500 |   |  			
            | 7/20/2011 | 0.00 / 0.00% | 6.40 | 6.60 | 6.20 | 6.50 | 6.50 | 6.50 | 56,400 |   |  
            | 7/19/2011 | -0.30 / -4.41% | 6.50 | 6.50 | 6.40 | 6.50 | 6.50 | 6.50 | 8,500 |   |  			
            | 7/18/2011 | +0.20 / +3.03% | 6.70 | 6.80 | 6.60 | 6.80 | 6.80 | 6.80 | 17,800 |   |  
            | 7/15/2011 | -0.20 / -2.94% | 6.60 | 6.70 | 6.60 | 6.60 | 6.63 | 6.60 | 11,600 |   |  			
            | 7/14/2011 | 0.00 / 0.00% | 6.60 | 6.80 | 6.60 | 6.80 | 6.80 | 6.80 | 14,200 |   |  
            | 7/13/2011 | 0.00 / 0.00% | 6.80 | 6.80 | 6.80 | 6.80 | 6.80 | 6.80 | 206,100 |   |  			
            | 7/12/2011 | +0.20 / +3.03% | 6.50 | 6.80 | 6.50 | 6.80 | 6.80 | 6.80 | 7,100 |   |  
            | 7/11/2011 | -0.20 / -2.94% | 6.80 | 6.80 | 6.50 | 6.60 | 6.60 | 6.60 | 8,800 |   |  			
            | 7/8/2011 | -0.20 / -2.86% | 7.00 | 7.00 | 6.80 | 6.80 | 7.00 | 6.80 | 11,500 |   |  
            | 7/7/2011 | 0.00 / 0.00% | 6.90 | 7.20 | 6.90 | 7.00 | 7.00 | 7.00 | 14,300 |   |  			
            | 7/6/2011 | -0.20 / -2.78% | 7.00 | 7.00 | 6.90 | 7.00 | 7.00 | 7.00 | 14,800 |   |  
            | 7/5/2011 | +0.40 / +5.88% | 7.20 | 7.20 | 7.20 | 7.20 | 7.20 | 7.20 | 28,400 |   |  			
            | 7/4/2011 | +0.20 / +3.03% | 6.80 | 6.80 | 6.70 | 6.80 | 6.80 | 6.80 | 9,900 |   |  
            | 7/1/2011 | -0.20 / -2.94% | 6.60 | 6.70 | 6.60 | 6.60 | 6.63 | 6.60 | 18,100 |   |  			
            | 6/30/2011 | -0.40 / -5.56% | 6.80 | 7.00 | 6.80 | 6.80 | 6.80 | 6.80 | 47,400 |   |  
            | 6/29/2011 | 0.00 / 0.00% | 7.10 | 7.30 | 7.00 | 7.20 | 7.20 | 7.20 | 19,300 |   |  			
            | 6/28/2011 | -0.30 / -4.00% | 7.40 | 7.40 | 7.20 | 7.20 | 7.20 | 7.20 | 10,500 |   |  
            | 6/27/2011 | +0.10 / +1.35% | 7.20 | 7.50 | 7.20 | 7.50 | 7.50 | 7.50 | 13,700 |   |  			
            | 6/24/2011 | +0.10 / +1.37% | 7.30 | 7.40 | 7.20 | 7.40 | 7.30 | 7.40 | 15,600 |   |  
            | 6/23/2011 | -0.40 / -5.19% | 7.40 | 7.40 | 7.20 | 7.30 | 7.30 | 7.30 | 17,800 |   |  |