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                    Closing price on 6/7/2012
                 |  |  
    
        |           
                
                    | Open | 39.00 |  
                    | High | 39.50 |  
                    | Low | 37.60 |  
                    | Volume | 23,110 |  
                    | Split-adjusted Price | 3.99 |  
                
             | 
 |  IMP Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/7/2012 | -1.30 / -3.34% | 39.00 | 39.50 | 37.60 | 37.60 | 37.60 | 3.99 | 23,110 |   |  
            | 6/6/2012 | +0.90 / +2.37% | 38.00 | 38.90 | 38.00 | 38.90 | 38.90 | 4.13 | 15,640 |   |  			
            | 6/5/2012 | 0.00 / 0.00% | 37.50 | 39.00 | 37.50 | 38.00 | 38.00 | 4.03 | 10,380 |   |  
            | 6/4/2012 | 0.00 / 0.00% | 37.00 | 38.00 | 36.90 | 38.00 | 38.00 | 4.03 | 4,540 |   |  			
            | 6/1/2012 | +1.10 / +2.98% | 37.50 | 38.00 | 37.00 | 38.00 | 38.00 | 4.03 | 3,810 |   |  
            | 5/31/2012 | -0.40 / -1.07% | 36.80 | 38.00 | 36.80 | 36.90 | 36.90 | 3.91 | 11,130 |   |  			
            | 5/30/2012 | +1.70 / +4.78% | 37.30 | 37.30 | 37.20 | 37.30 | 37.30 | 3.96 | 3,620 |   |  
            | 5/29/2012 | -1.80 / -4.81% | 37.40 | 39.00 | 35.60 | 35.60 | 35.60 | 3.78 | 500 |   |  			
            | 5/28/2012 | +0.90 / +2.47% | 37.40 | 37.40 | 37.40 | 37.40 | 37.40 | 3.97 | 30 |   |  
            | 5/25/2012 | -0.50 / -1.35% | 36.40 | 37.80 | 36.40 | 36.50 | 36.50 | 3.87 | 4,250 |   |  			
            | 5/24/2012 | +0.10 / +0.27% | 36.80 | 37.30 | 36.70 | 37.00 | 37.00 | 3.93 | 1,750 |   |  
            | 5/23/2012 | +0.40 / +1.10% | 36.50 | 37.30 | 36.40 | 36.90 | 36.90 | 3.91 | 6,330 |   |  			
            | 5/22/2012 | +0.40 / +1.11% | 37.00 | 37.00 | 36.40 | 36.50 | 36.50 | 3.87 | 8,230 |   |  
            | 5/21/2012 | +0.20 / +0.56% | 35.70 | 36.40 | 35.70 | 36.10 | 36.10 | 3.83 | 1,990 |   |  			
            | 5/18/2012 | -0.30 / -0.83% | 36.20 | 36.20 | 35.90 | 35.90 | 35.90 | 3.81 | 15,260 |   |  
            | 5/17/2012 | +0.10 / +0.28% | 36.00 | 37.00 | 36.00 | 36.20 | 36.20 | 3.84 | 3,560 |   |  			
            | 5/16/2012 | -0.90 / -2.43% | 36.00 | 37.00 | 36.00 | 36.10 | 36.10 | 3.83 | 5,840 |   |  
            | 5/15/2012 | +0.10 / +0.27% | 35.20 | 37.00 | 35.20 | 37.00 | 37.00 | 3.93 | 7,820 |   |  			
            | 5/14/2012 | -0.80 / -2.12% | 37.70 | 37.70 | 36.90 | 36.90 | 36.90 | 3.91 | 3,830 |   |  
            | 5/11/2012 | -0.20 / -0.53% | 37.00 | 37.80 | 37.00 | 37.70 | 37.70 | 4.00 | 4,650 |   |  			
            | 5/10/2012 | 0.00 / 0.00% | 38.00 | 38.00 | 37.20 | 37.90 | 37.90 | 4.02 | 18,190 |   |  
            | 5/9/2012 | +0.40 / +1.07% | 37.80 | 38.90 | 37.80 | 37.90 | 37.90 | 4.02 | 10,280 |   |  			
            | 5/8/2012 | +0.10 / +0.27% | 37.20 | 37.80 | 37.20 | 37.50 | 37.50 | 3.98 | 15,560 |   |  
            | 5/7/2012 | +0.30 / +0.81% | 37.00 | 37.40 | 37.00 | 37.40 | 37.40 | 3.97 | 14,720 |   |  			
            | 5/4/2012 | -0.10 / -0.27% | 37.00 | 37.20 | 36.60 | 37.10 | 37.10 | 3.94 | 19,730 |   |  
            | 5/3/2012 | +0.20 / +0.54% | 37.30 | 37.30 | 37.20 | 37.20 | 37.20 | 3.95 | 890 |   |  			
            | 5/2/2012 | -0.80 / -2.12% | 37.20 | 37.20 | 37.00 | 37.00 | 37.00 | 3.93 | 5,080 |   |  
            | 4/27/2012 | -0.10 / -0.26% | 37.60 | 37.80 | 37.60 | 37.80 | 37.80 | 4.01 | 10,740 |   |  			
            | 4/26/2012 | 0.00 / 0.00% | 37.50 | 37.90 | 37.10 | 37.90 | 37.90 | 4.02 | 15,700 |   |  
            | 4/25/2012 | -1.20 / -3.07% | 36.90 | 37.90 | 36.90 | 37.90 | 37.90 | 4.02 | 9,050 |   |  |