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                    Closing price on 4/4/2012
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        |           
                
                    | Open | 5.20 |  
                    | High | 5.20 |  
                    | Low | 4.80 |  
                    | Volume | 87,500 |  
                    | Split-adjusted Price | 4.90 |  
                
             | 
 |  V15 Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  			
            | 3/8/2012 | -0.20 / -3.77% | 5.20 | 5.50 | 5.00 | 5.10 | 5.10 | 5.10 | 275,600 |   |  
            | 3/7/2012 | +0.10 / +1.92% | 5.20 | 5.40 | 4.90 | 5.30 | 5.30 | 5.30 | 194,200 |   |  			
            | 3/6/2012 | +0.30 / +6.12% | 5.20 | 5.20 | 4.90 | 5.20 | 5.20 | 5.20 | 477,100 |   |  
            | 3/5/2012 | +0.30 / +6.52% | 4.70 | 4.90 | 4.70 | 4.90 | 4.90 | 4.90 | 180,800 |   |  			
            | 3/2/2012 | +0.20 / +4.55% | 4.50 | 4.70 | 4.40 | 4.60 | 4.40 | 4.60 | 205,800 |   |  
            | 3/1/2012 | -0.20 / -4.35% | 4.60 | 4.60 | 4.30 | 4.40 | 4.40 | 4.40 | 256,700 |   |  			
            | 2/29/2012 | +0.10 / +2.22% | 4.60 | 4.70 | 4.40 | 4.60 | 4.60 | 4.60 | 164,500 |   |  
            | 2/28/2012 | -0.40 / -8.16% | 5.00 | 5.10 | 4.50 | 4.50 | 4.50 | 4.50 | 126,700 |   |  			
            | 2/27/2012 | +0.40 / +8.89% | 4.70 | 4.90 | 4.50 | 4.90 | 4.90 | 4.90 | 201,600 |   |  
            | 2/24/2012 | +0.10 / +2.27% | 4.40 | 4.60 | 4.40 | 4.50 | 4.40 | 4.50 | 158,300 |   |  			
            | 2/23/2012 | -0.60 / -12.00% | 4.40 | 4.40 | 4.00 | 4.40 | 4.40 | 4.40 | 233,200 |   |  
            | 2/22/2012 | +0.30 / +6.38% | 4.70 | 5.10 | 4.60 | 5.00 | 5.00 | 5.00 | 207,100 |   |  |