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                    Closing price on 3/21/2012
                 |  |  
    
        |           
                
                    | Open | 7.10 |  
                    | High | 7.50 |  
                    | Low | 7.10 |  
                    | Volume | 717,400 |  
                    | Split-adjusted Price | 6.10 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/21/2012 | 0.00 / 0.00% | 7.10 | 7.50 | 7.10 | 7.10 | 7.28 | 6.10 | 717,400 |   |  
            | 3/20/2012 | 0.00 / 0.00% | 6.70 | 7.30 | 6.70 | 7.10 | 7.14 | 6.10 | 474,000 |   |  			
            | 3/19/2012 | +0.10 / +1.43% | 7.00 | 7.30 | 6.90 | 7.10 | 7.19 | 6.10 | 267,200 |   |  
            | 3/16/2012 | +0.10 / +1.45% | 6.70 | 7.00 | 6.70 | 7.00 | 6.96 | 6.01 | 1,173,600 |   |  			
            | 3/15/2012 | +0.50 / +7.81% | 6.60 | 7.00 | 6.20 | 6.90 | 6.57 | 5.93 | 275,800 |   |  
            | 3/14/2012 | -0.40 / -5.88% | 6.60 | 6.80 | 6.20 | 6.40 | 6.63 | 5.50 | 405,200 |   |  			
            | 3/13/2012 | +0.10 / +1.49% | 6.40 | 6.80 | 6.40 | 6.80 | 6.57 | 5.84 | 513,300 |   |  
            | 3/12/2012 | -0.10 / -1.47% | 7.10 | 7.20 | 6.70 | 6.70 | 6.84 | 5.75 | 123,000 |   |  			
            | 3/9/2012 | -0.20 / -2.86% | 7.30 | 7.50 | 6.80 | 6.80 | 7.07 | 5.84 | 104,700 |   |  
            | 3/8/2012 | -0.60 / -7.89% | 7.60 | 7.90 | 7.00 | 7.00 | 7.32 | 6.01 | 136,300 |   |  			
            | 3/7/2012 | +0.60 / +8.57% | 7.80 | 7.80 | 6.90 | 7.60 | 7.45 | 6.53 | 268,700 |   |  
            | 3/6/2012 | -0.30 / -4.11% | 7.60 | 7.70 | 6.80 | 7.00 | 7.42 | 6.01 | 313,200 |   |  			
            | 3/5/2012 | +0.90 / +14.06% | 7.10 | 7.30 | 6.80 | 7.30 | 7.17 | 6.27 | 585,400 |   |  
            | 3/2/2012 | -0.20 / -3.03% | 6.50 | 7.10 | 6.30 | 6.40 | 6.86 | 5.50 | 102,400 |   |  			
            | 3/1/2012 | +0.70 / +11.86% | 6.70 | 6.80 | 6.00 | 6.60 | 6.65 | 5.67 | 120,300 |   |  
            | 2/29/2012 | -0.60 / -9.23% | 6.70 | 6.70 | 5.90 | 5.90 | 6.44 | 5.07 | 112,500 |   |  			
            | 2/28/2012 | +0.40 / +6.56% | 6.60 | 6.60 | 5.80 | 6.50 | 6.35 | 5.58 | 175,100 |   |  
            | 2/27/2012 | +0.60 / +10.91% | 6.30 | 6.30 | 5.50 | 6.10 | 6.18 | 5.24 | 365,700 |   |  			
            | 2/24/2012 | +0.10 / +1.85% | 6.20 | 6.30 | 5.50 | 5.50 | 5.92 | 4.72 | 57,300 |   |  
            | 2/23/2012 | +0.10 / +1.89% | 6.00 | 6.00 | 5.40 | 5.40 | 5.86 | 4.64 | 41,400 |   |  			
            | 2/22/2012 | +0.30 / +6.00% | 5.20 | 5.80 | 5.20 | 5.30 | 5.69 | 4.55 | 156,300 |   |  
            | 2/21/2012 | 0.00 / 0.00% | 5.20 | 5.60 | 5.00 | 5.00 | 5.47 | 4.29 | 115,000 |   |  			
            | 2/20/2012 | +0.20 / +4.17% | 4.90 | 5.30 | 4.90 | 5.00 | 5.26 | 4.29 | 233,600 |   |  
            | 2/17/2012 | +0.40 / +9.09% | 4.70 | 5.10 | 4.60 | 4.80 | 4.98 | 4.12 | 134,300 |   |  			
            | 2/16/2012 | +0.20 / +4.76% | 4.60 | 5.00 | 4.40 | 4.40 | 4.81 | 3.78 | 93,600 |   |  
            | 2/15/2012 | -0.30 / -6.67% | 4.40 | 4.80 | 4.20 | 4.20 | 4.70 | 3.61 | 77,400 |   |  			
            | 2/14/2012 | 0.00 / 0.00% | 4.50 | 4.50 | 4.50 | 4.50 | 4.50 | 3.86 | 300 |   |  
            | 2/13/2012 | -0.10 / -2.17% | 4.50 | 4.90 | 4.40 | 4.50 | 4.80 | 3.86 | 108,700 |   |  			
            | 2/10/2012 | 0.00 / 0.00% | 4.60 | 4.60 | 4.60 | 4.60 | 4.60 | 3.95 | 100 |   |  
            | 2/9/2012 | -0.30 / -6.12% | 4.80 | 5.00 | 4.60 | 4.60 | 4.90 | 3.95 | 22,000 |   |  |