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            | 
                    Closing price on 2/17/2016
                 |  |  
    
        |           
                
                    | Open | 15.80 |  
                    | High | 15.80 |  
                    | Low | 15.60 |  
                    | Volume | 149,800 |  
                    | Split-adjusted Price | 14.05 |  
                
             | 
 |  IVS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 1/12/2016 | +0.10 / +0.58% | 17.10 | 17.40 | 17.00 | 17.20 | 17.14 | 15.40 | 479,400 |   |  			
            | 1/11/2016 | +0.10 / +0.59% | 17.00 | 17.30 | 17.00 | 17.10 | 17.19 | 15.31 | 527,300 |   |  
            | 1/8/2016 | +0.20 / +1.19% | 16.80 | 17.00 | 16.70 | 17.00 | 16.80 | 15.22 | 598,500 |   |  			
            | 1/7/2016 | -0.20 / -1.18% | 17.00 | 17.00 | 16.70 | 16.80 | 16.88 | 15.04 | 374,300 |   |  
            | 1/6/2016 | +0.20 / +1.19% | 16.80 | 17.00 | 16.70 | 17.00 | 16.95 | 15.22 | 296,700 |   |  			
            | 1/5/2016 | -0.30 / -1.75% | 17.10 | 17.10 | 16.80 | 16.80 | 17.10 | 15.04 | 270,400 |   |  
            | 1/4/2016 | 0.00 / 0.00% | 17.10 | 17.20 | 16.90 | 17.10 | 17.05 | 15.31 | 362,800 |   |  			
            | 12/31/2015 | 0.00 / 0.00% | 17.10 | 17.10 | 17.00 | 17.10 | 17.10 | 15.31 | 313,300 |   |  
            | 12/30/2015 | 0.00 / 0.00% | 17.10 | 17.20 | 17.10 | 17.10 | 17.19 | 15.31 | 347,100 |   |  |