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            | 
                    Closing price on 3/31/2015
                 |  |  
    
        |           
                
                    | Open | 13.40 |  
                    | High | 13.50 |  
                    | Low | 13.20 |  
                    | Volume | 386,100 |  
                    | Split-adjusted Price | 11.59 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/31/2015 | +0.10 / +0.75% | 13.40 | 13.50 | 13.20 | 13.50 | 13.33 | 11.59 | 386,100 |   |  
            | 3/30/2015 | 0.00 / 0.00% | 13.50 | 13.50 | 13.30 | 13.40 | 13.37 | 11.51 | 291,800 |   |  			
            | 3/27/2015 | -0.20 / -1.47% | 13.60 | 13.70 | 13.30 | 13.40 | 13.52 | 11.51 | 341,000 |   |  
            | 3/26/2015 | -0.40 / -2.86% | 13.90 | 13.90 | 12.70 | 13.60 | 13.65 | 11.68 | 605,700 |   |  			
            | 3/25/2015 | -0.20 / -1.41% | 14.20 | 14.20 | 13.90 | 14.00 | 14.15 | 12.02 | 295,500 |   |  
            | 3/24/2015 | -0.20 / -1.39% | 14.40 | 14.50 | 14.10 | 14.20 | 14.31 | 12.19 | 536,600 |   |  			
            | 3/23/2015 | -0.30 / -2.04% | 14.70 | 14.70 | 13.30 | 14.40 | 14.14 | 12.37 | 813,700 |   |  
            | 3/20/2015 | -0.30 / -2.00% | 15.00 | 15.10 | 14.70 | 14.70 | 14.89 | 12.62 | 971,400 |   |  			
            | 3/19/2015 | -0.20 / -1.32% | 15.20 | 15.40 | 15.00 | 15.00 | 15.21 | 12.88 | 636,600 |   |  
            | 3/18/2015 | -0.30 / -1.94% | 15.50 | 15.60 | 15.20 | 15.20 | 15.31 | 13.05 | 375,800 |   |  			
            | 3/17/2015 | 0.00 / 0.00% | 15.40 | 15.60 | 15.40 | 15.50 | 15.50 | 13.31 | 663,400 |   |  
            | 3/16/2015 | 0.00 / 0.00% | 15.50 | 15.60 | 15.40 | 15.50 | 15.50 | 13.31 | 757,600 |   |  			
            | 3/13/2015 | +0.10 / +0.65% | 15.40 | 15.70 | 15.40 | 15.50 | 15.54 | 13.31 | 334,100 |   |  
            | 3/12/2015 | 0.00 / 0.00% | 15.40 | 15.50 | 15.30 | 15.40 | 15.40 | 13.22 | 272,100 |   |  			
            | 3/11/2015 | -0.20 / -1.28% | 15.60 | 15.60 | 15.20 | 15.40 | 15.36 | 13.22 | 512,500 |   |  
            | 3/10/2015 | -0.20 / -1.27% | 15.80 | 15.90 | 15.50 | 15.60 | 15.70 | 13.40 | 386,300 |   |  			
            | 3/9/2015 | -0.40 / -2.47% | 16.20 | 16.20 | 15.80 | 15.80 | 16.13 | 13.57 | 307,800 |   |  
            | 3/6/2015 | 0.00 / 0.00% | 16.20 | 16.30 | 16.00 | 16.20 | 16.10 | 13.91 | 285,600 |   |  			
            | 3/5/2015 | 0.00 / 0.00% | 16.20 | 16.30 | 16.10 | 16.20 | 16.20 | 13.91 | 302,000 |   |  
            | 3/4/2015 | +0.50 / +3.18% | 15.70 | 16.20 | 15.70 | 16.20 | 15.93 | 13.91 | 415,300 |   |  			
            | 3/3/2015 | +0.10 / +0.64% | 15.60 | 15.70 | 15.50 | 15.70 | 15.58 | 13.48 | 351,800 |   |  
            | 3/2/2015 | 0.00 / 0.00% | 15.60 | 15.70 | 15.50 | 15.60 | 15.59 | 13.40 | 319,200 |   |  			
            | 2/27/2015 | +0.10 / +0.65% | 15.50 | 15.70 | 15.50 | 15.60 | 15.59 | 13.40 | 253,700 |   |  
            | 2/26/2015 | +0.10 / +0.65% | 15.30 | 15.60 | 15.20 | 15.50 | 15.32 | 13.31 | 480,100 |   |  			
            | 2/25/2015 | -0.20 / -1.28% | 15.60 | 15.70 | 15.10 | 15.40 | 15.44 | 13.22 | 801,600 |   |  
            | 2/24/2015 | +0.50 / +3.31% | 15.10 | 15.60 | 15.10 | 15.60 | 15.23 | 13.40 | 417,400 |   |  			
            | 2/13/2015 | +0.30 / +2.03% | 14.80 | 15.10 | 14.80 | 15.10 | 14.92 | 12.97 | 548,800 |   |  
            | 2/12/2015 | +0.40 / +2.78% | 14.40 | 14.80 | 14.40 | 14.80 | 14.59 | 12.71 | 630,600 |   |  			
            | 2/11/2015 | +1.10 / +8.27% | 13.20 | 14.50 | 13.20 | 14.40 | 13.55 | 12.37 | 869,800 |   |  
            | 2/10/2015 | -0.20 / -1.48% | 13.40 | 13.50 | 13.10 | 13.30 | 13.36 | 11.42 | 251,500 |   |  |