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                    Closing price on 5/7/2012
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                    | Open | 7.70 |  
                    | High | 8.00 |  
                    | Low | 7.40 |  
                    | Volume | 543,800 |  
                    | Split-adjusted Price | 6.70 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/7/2012 | +0.20 / +2.63% | 7.70 | 8.00 | 7.40 | 7.80 | 7.70 | 6.70 | 543,800 |   |  
            | 5/4/2012 | +0.10 / +1.33% | 7.40 | 7.70 | 7.20 | 7.60 | 7.58 | 6.53 | 342,800 |   |  			
            | 5/3/2012 | +0.40 / +5.63% | 7.00 | 7.50 | 6.70 | 7.50 | 7.04 | 6.44 | 489,200 |   |  
            | 5/2/2012 | -0.40 / -5.33% | 7.60 | 7.70 | 7.10 | 7.10 | 7.28 | 6.10 | 283,600 |   |  			
            | 4/27/2012 | -0.50 / -6.25% | 7.80 | 8.10 | 7.50 | 7.50 | 7.74 | 6.44 | 518,500 |   |  
            | 4/26/2012 | +0.30 / +3.90% | 7.80 | 8.20 | 7.70 | 8.00 | 7.95 | 6.87 | 427,900 |   |  			
            | 4/25/2012 | +0.50 / +6.94% | 7.30 | 7.70 | 7.20 | 7.70 | 7.61 | 6.61 | 508,400 |   |  
            | 4/24/2012 | +0.40 / +5.88% | 6.90 | 7.20 | 6.90 | 7.20 | 7.14 | 6.18 | 688,000 |   |  			
            | 4/23/2012 | +0.40 / +6.25% | 6.70 | 6.80 | 6.50 | 6.80 | 6.78 | 5.84 | 526,800 |   |  
            | 4/20/2012 | 0.00 / 0.00% | 6.40 | 6.40 | 6.20 | 6.40 | 6.39 | 5.50 | 229,700 |   |  			
            | 4/19/2012 | -0.30 / -4.48% | 6.60 | 6.60 | 6.30 | 6.40 | 6.41 | 5.50 | 215,600 |   |  
            | 4/18/2012 | 0.00 / 0.00% | 6.80 | 6.80 | 6.40 | 6.70 | 6.66 | 5.75 | 126,600 |   |  			
            | 4/17/2012 | -0.20 / -2.90% | 6.90 | 7.00 | 6.60 | 6.70 | 6.76 | 5.75 | 238,200 |   |  
            | 4/16/2012 | +0.10 / +1.47% | 6.80 | 7.00 | 6.80 | 6.90 | 6.87 | 5.93 | 220,900 |   |  			
            | 4/13/2012 | 0.00 / 0.00% | 6.80 | 7.10 | 6.60 | 6.80 | 6.93 | 5.84 | 198,700 |   |  
            | 4/12/2012 | +0.20 / +3.03% | 6.70 | 7.00 | 6.70 | 6.80 | 6.87 | 5.84 | 233,300 |   |  			
            | 4/11/2012 | +0.40 / +6.45% | 6.30 | 6.60 | 6.20 | 6.60 | 6.56 | 5.67 | 431,600 |   |  
            | 4/10/2012 | -0.10 / -1.59% | 6.20 | 6.30 | 6.10 | 6.20 | 6.15 | 5.32 | 158,400 |   |  			
            | 4/9/2012 | +0.10 / +1.61% | 6.20 | 6.30 | 6.10 | 6.30 | 6.19 | 5.41 | 125,600 |   |  
            | 4/6/2012 | 0.00 / 0.00% | 6.20 | 6.30 | 6.10 | 6.20 | 6.28 | 5.32 | 121,200 |   |  			
            | 4/5/2012 | +0.30 / +5.08% | 6.00 | 6.20 | 5.90 | 6.20 | 6.08 | 5.32 | 142,300 |   |  
            | 4/4/2012 | -0.20 / -3.28% | 6.10 | 6.20 | 5.90 | 5.90 | 6.05 | 5.07 | 243,000 |   |  			
            | 4/3/2012 | +0.30 / +5.17% | 5.90 | 6.20 | 5.80 | 6.10 | 6.09 | 5.24 | 273,400 |   |  
            | 3/30/2012 | -0.10 / -1.69% | 5.90 | 6.00 | 5.60 | 5.80 | 5.84 | 4.98 | 183,200 |   |  			
            | 3/29/2012 | -0.30 / -4.84% | 6.20 | 6.20 | 5.80 | 5.90 | 6.06 | 5.07 | 160,200 |   |  
            | 3/28/2012 | -0.40 / -6.06% | 6.30 | 6.40 | 6.20 | 6.20 | 6.25 | 5.32 | 184,500 |   |  			
            | 3/27/2012 | -0.40 / -5.71% | 7.00 | 7.10 | 6.60 | 6.60 | 6.69 | 5.67 | 218,500 |   |  
            | 3/26/2012 | +0.10 / +1.45% | 7.10 | 7.30 | 6.70 | 7.00 | 6.96 | 6.01 | 183,600 |   |  			
            | 3/23/2012 | 0.00 / 0.00% | 7.20 | 7.20 | 6.80 | 6.90 | 7.11 | 5.93 | 375,200 |   |  
            | 3/22/2012 | -0.20 / -2.82% | 7.30 | 7.50 | 6.80 | 6.90 | 7.15 | 5.93 | 395,700 |   |  |