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            | 
                    Closing price on 3/1/2016
                 |  |  
    
        |           
                
                    | Open | 17.00 |  
                    | High | 17.20 |  
                    | Low | 16.90 |  
                    | Volume | 309,100 |  
                    | Split-adjusted Price | 15.40 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/1/2016 | +0.20 / +1.18% | 17.00 | 17.20 | 16.90 | 17.20 | 16.99 | 15.40 | 309,100 |   |  
            | 2/29/2016 | +0.30 / +1.80% | 16.70 | 17.20 | 16.60 | 17.00 | 16.85 | 15.22 | 385,400 |   |  			
            | 2/26/2016 | +0.30 / +1.83% | 16.40 | 16.80 | 16.40 | 16.70 | 16.68 | 14.95 | 290,000 |   |  
            | 2/25/2016 | -0.10 / -0.61% | 16.50 | 16.90 | 16.40 | 16.40 | 16.50 | 14.68 | 394,600 |   |  			
            | 2/24/2016 | +0.20 / +1.23% | 16.20 | 16.70 | 16.20 | 16.50 | 16.48 | 14.77 | 301,300 |   |  
            | 2/23/2016 | +0.10 / +0.62% | 16.20 | 17.70 | 16.20 | 16.30 | 16.48 | 14.59 | 322,000 |   |  			
            | 2/22/2016 | +0.40 / +2.53% | 15.80 | 16.30 | 15.80 | 16.20 | 16.09 | 14.50 | 285,600 |   |  
            | 2/19/2016 | 0.00 / 0.00% | 15.80 | 15.90 | 15.70 | 15.80 | 15.81 | 14.14 | 436,200 |   |  			
            | 2/18/2016 | +0.10 / +0.64% | 15.70 | 15.90 | 15.70 | 15.80 | 15.76 | 14.14 | 140,900 |   |  
            | 2/17/2016 | -0.10 / -0.63% | 15.80 | 15.80 | 15.60 | 15.70 | 15.70 | 14.05 | 149,800 |   |  			
            | 2/16/2016 | +0.10 / +0.64% | 15.70 | 15.90 | 15.70 | 15.80 | 15.80 | 14.14 | 145,800 |   |  
            | 2/15/2016 | -0.20 / -1.26% | 15.90 | 15.90 | 15.60 | 15.70 | 15.80 | 14.05 | 161,800 |   |  			
            | 2/5/2016 | +0.10 / +0.63% | 15.80 | 15.90 | 15.00 | 15.90 | 15.61 | 14.23 | 137,200 |   |  
            | 2/4/2016 | 0.00 / 0.00% | 15.80 | 16.00 | 15.80 | 15.80 | 15.80 | 14.14 | 132,500 |   |  			
            | 2/3/2016 | -0.20 / -1.25% | 16.00 | 16.00 | 15.00 | 15.80 | 15.71 | 14.14 | 154,400 |   |  
            | 2/2/2016 | -0.30 / -1.84% | 16.20 | 16.30 | 16.00 | 16.00 | 16.15 | 14.32 | 152,600 |   |  			
            | 2/1/2016 | -0.20 / -1.21% | 16.50 | 16.60 | 16.30 | 16.30 | 16.42 | 14.59 | 185,800 |   |  
            | 1/29/2016 | 0.00 / 0.00% | 16.50 | 16.60 | 16.30 | 16.50 | 16.50 | 14.77 | 203,800 |   |  			
            | 1/28/2016 | -0.20 / -1.20% | 16.70 | 16.80 | 16.40 | 16.50 | 16.70 | 14.77 | 167,500 |   |  
            | 1/27/2016 | +0.10 / +0.60% | 16.60 | 16.80 | 16.50 | 16.70 | 16.60 | 14.95 | 275,700 |   |  			
            | 1/26/2016 | -0.20 / -1.19% | 16.80 | 16.90 | 16.50 | 16.60 | 16.67 | 14.86 | 240,500 |   |  
            | 1/25/2016 | +0.10 / +0.60% | 16.70 | 17.00 | 16.70 | 16.80 | 16.84 | 15.04 | 275,600 |   |  			
            | 1/22/2016 | 0.00 / 0.00% | 16.70 | 16.90 | 16.60 | 16.70 | 16.74 | 14.95 | 217,600 |   |  
            | 1/21/2016 | -0.20 / -1.18% | 16.90 | 16.90 | 16.70 | 16.70 | 16.82 | 14.95 | 813,400 |   |  			
            | 1/20/2016 | -0.10 / -0.59% | 17.00 | 17.00 | 16.80 | 16.90 | 17.00 | 15.13 | 254,900 |   |  
            | 1/19/2016 | +0.50 / +3.03% | 16.50 | 17.00 | 16.50 | 17.00 | 16.71 | 15.22 | 581,300 |   |  			
            | 1/18/2016 | -0.30 / -1.79% | 16.80 | 16.80 | 16.30 | 16.50 | 16.53 | 14.77 | 276,100 |   |  
            | 1/15/2016 | +0.10 / +0.60% | 16.70 | 16.90 | 16.60 | 16.80 | 16.73 | 15.04 | 243,100 |   |  			
            | 1/14/2016 | -0.30 / -1.76% | 17.00 | 17.00 | 16.70 | 16.70 | 16.78 | 14.95 | 428,000 |   |  
            | 1/13/2016 | -0.20 / -1.16% | 17.20 | 17.40 | 17.00 | 17.00 | 17.23 | 15.22 | 419,100 |   |  |