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                    Closing price on 6/20/2012
                 |  |  
    
        |           
                
                    | Open | 6.50 |  
                    | High | 6.50 |  
                    | Low | 6.20 |  
                    | Volume | 124,100 |  
                    | Split-adjusted Price | 5.50 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/20/2012 | 0.00 / 0.00% | 6.50 | 6.50 | 6.20 | 6.40 | 6.40 | 5.50 | 124,100 |   |  
            | 6/19/2012 | -0.10 / -1.54% | 6.60 | 6.60 | 6.20 | 6.40 | 6.45 | 5.50 | 111,500 |   |  			
            | 6/18/2012 | 0.00 / 0.00% | 6.30 | 6.60 | 6.30 | 6.50 | 6.50 | 5.58 | 140,800 |   |  
            | 6/15/2012 | 0.00 / 0.00% | 6.50 | 6.50 | 6.40 | 6.50 | 6.43 | 5.58 | 113,800 |   |  			
            | 6/14/2012 | 0.00 / 0.00% | 6.50 | 6.50 | 6.30 | 6.50 | 6.42 | 5.58 | 431,000 |   |  
            | 6/13/2012 | 0.00 / 0.00% | 6.60 | 6.60 | 6.30 | 6.50 | 6.43 | 5.58 | 118,900 |   |  			
            | 6/12/2012 | -0.20 / -2.99% | 6.60 | 6.70 | 6.50 | 6.50 | 6.58 | 5.58 | 384,100 |   |  
            | 6/11/2012 | +0.20 / +3.08% | 6.50 | 6.70 | 6.40 | 6.70 | 6.60 | 5.75 | 171,600 |   |  			
            | 6/8/2012 | -0.10 / -1.52% | 6.70 | 6.80 | 6.30 | 6.50 | 6.63 | 5.58 | 226,200 |   |  
            | 6/7/2012 | 0.00 / 0.00% | 6.70 | 6.80 | 6.50 | 6.60 | 6.61 | 5.67 | 248,300 |   |  			
            | 6/6/2012 | +0.10 / +1.54% | 6.60 | 6.60 | 6.40 | 6.60 | 6.52 | 5.67 | 293,400 |   |  
            | 6/5/2012 | +0.40 / +6.56% | 6.30 | 6.50 | 6.00 | 6.50 | 6.28 | 5.58 | 214,100 |   |  			
            | 6/4/2012 | -0.20 / -3.17% | 6.50 | 6.50 | 6.10 | 6.10 | 6.27 | 5.24 | 177,000 |   |  
            | 6/1/2012 | -0.10 / -1.56% | 6.40 | 6.50 | 6.20 | 6.30 | 6.41 | 5.41 | 118,500 |   |  			
            | 5/31/2012 | -0.10 / -1.54% | 6.50 | 6.50 | 6.20 | 6.40 | 6.40 | 5.50 | 169,200 |   |  
            | 5/30/2012 | -0.10 / -1.52% | 6.50 | 6.60 | 6.50 | 6.50 | 6.55 | 5.58 | 162,800 |   |  			
            | 5/29/2012 | -0.10 / -1.49% | 6.60 | 6.60 | 6.40 | 6.60 | 6.50 | 5.67 | 147,900 |   |  
            | 5/28/2012 | +0.20 / +3.08% | 6.60 | 6.80 | 6.40 | 6.70 | 6.63 | 5.75 | 363,400 |   |  			
            | 5/25/2012 | +0.10 / +1.56% | 6.20 | 6.50 | 6.20 | 6.50 | 6.39 | 5.58 | 356,900 |   |  
            | 5/24/2012 | 0.00 / 0.00% | 6.40 | 6.60 | 6.00 | 6.40 | 6.25 | 5.50 | 291,100 |   |  			
            | 5/23/2012 | -0.50 / -7.25% | 6.80 | 6.80 | 6.40 | 6.40 | 6.68 | 5.50 | 141,300 |   |  
            | 5/22/2012 | +0.10 / +1.47% | 6.90 | 7.00 | 6.70 | 6.90 | 6.89 | 5.93 | 553,500 |   |  			
            | 5/21/2012 | +0.30 / +4.62% | 6.50 | 6.80 | 6.40 | 6.80 | 6.63 | 5.84 | 323,700 |   |  
            | 5/18/2012 | +0.10 / +1.56% | 6.80 | 6.90 | 6.30 | 6.50 | 6.55 | 5.58 | 328,300 |   |  			
            | 5/17/2012 | -0.20 / -3.03% | 6.70 | 7.00 | 6.40 | 6.40 | 6.71 | 5.50 | 376,300 |   |  
            | 5/16/2012 | -0.10 / -1.49% | 6.70 | 7.00 | 6.40 | 6.60 | 6.70 | 5.67 | 344,500 |   |  			
            | 5/15/2012 | -0.20 / -2.90% | 7.00 | 7.10 | 6.60 | 6.70 | 6.86 | 5.75 | 238,700 |   |  
            | 5/14/2012 | -0.50 / -6.76% | 7.40 | 7.60 | 6.90 | 6.90 | 7.21 | 5.93 | 260,300 |   |  			
            | 5/11/2012 | -0.30 / -3.90% | 7.80 | 7.90 | 7.40 | 7.40 | 7.65 | 6.35 | 648,100 |   |  
            | 5/10/2012 | 0.00 / 0.00% | 7.70 | 7.90 | 7.40 | 7.70 | 7.72 | 6.61 | 531,800 |   |  |