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            | 
                    Closing price on 2/21/2012
                 |  |  
    
        |           
                
                    | Open | 42.00 |  
                    | High | 42.00 |  
                    | Low | 42.00 |  
                    | Volume | 7,050 |  
                    | Split-adjusted Price | 4.21 |  
                
             | 
 |  IMP Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 2/21/2012 | +0.10 / +0.24% | 42.00 | 42.00 | 42.00 | 42.00 | 42.00 | 4.21 | 7,050 |   |  
            | 2/20/2012 | +0.90 / +2.20% | 41.90 | 41.90 | 40.00 | 41.90 | 41.90 | 4.20 | 16,540 |   |  			
            | 2/17/2012 | -1.00 / -2.38% | 42.00 | 42.00 | 39.90 | 41.00 | 41.00 | 4.11 | 57,280 |   |  
            | 2/16/2012 | +1.90 / +4.74% | 40.10 | 42.00 | 40.10 | 42.00 | 42.00 | 4.21 | 970 |   |  			
            | 2/15/2012 | -2.10 / -4.98% | 42.20 | 42.20 | 40.10 | 40.10 | 40.10 | 4.02 | 63,760 |   |  
            | 2/14/2012 | -0.80 / -1.86% | 42.50 | 42.50 | 42.20 | 42.20 | 42.20 | 4.23 | 1,650 |   |  			
            | 2/13/2012 | 0.00 / 0.00% | 41.20 | 43.00 | 41.00 | 43.00 | 43.00 | 4.31 | 8,800 |   |  
            | 2/10/2012 | -0.50 / -1.15% | 42.00 | 43.40 | 42.00 | 43.00 | 43.00 | 4.31 | 5,560 |   |  			
            | 2/9/2012 | +0.30 / +0.69% | 42.00 | 43.50 | 42.00 | 43.50 | 43.50 | 4.36 | 6,000 |   |  
            | 2/8/2012 | +0.20 / +0.47% | 42.00 | 43.20 | 42.00 | 43.20 | 43.20 | 4.33 | 3,510 |   |  			
            | 2/7/2012 | 0.00 / 0.00% | 42.00 | 43.00 | 42.00 | 43.00 | 43.00 | 4.31 | 2,500 |   |  
            | 2/6/2012 | 0.00 / 0.00% | 43.00 | 43.00 | 43.00 | 43.00 | 43.00 | 4.31 | 1,300 |   |  			
            | 2/3/2012 | 0.00 / 0.00% | 43.00 | 43.00 | 43.00 | 43.00 | 43.00 | 4.31 | 1,300 |   |  
            | 2/2/2012 | 0.00 / 0.00% | 43.00 | 43.00 | 43.00 | 43.00 | 43.00 | 4.31 | 3,010 |   |  			
            | 2/1/2012 | +0.70 / +1.65% | 43.00 | 43.00 | 43.00 | 43.00 | 43.00 | 4.31 | 1,340 |   |  
            | 1/31/2012 | -1.20 / -2.76% | 42.50 | 42.50 | 41.50 | 42.30 | 42.30 | 4.24 | 35,770 |   |  			
            | 1/30/2012 | +2.00 / +4.82% | 43.50 | 43.50 | 43.50 | 43.50 | 43.50 | 4.36 | 10 |   |  
            | 1/20/2012 | -0.50 / -1.19% | 42.00 | 42.00 | 41.50 | 41.50 | 41.50 | 4.16 | 21,420 |   |  			
            | 1/19/2012 | 0.00 / 0.00% | 42.00 | 42.00 | 42.00 | 42.00 | 42.00 | 4.21 | 41,000 |   |  
            | 1/18/2012 | +0.20 / +0.48% | 41.80 | 43.00 | 41.80 | 42.00 | 42.00 | 4.21 | 38,630 |   |  			
            | 1/17/2012 | 0.00 / 0.00% | 41.80 | 41.80 | 41.80 | 41.80 | 41.80 | 4.19 | 0 |   |  
            | 1/16/2012 | +1.90 / +4.76% | 41.80 | 41.80 | 41.80 | 41.80 | 41.80 | 4.19 | 10 |   |  			
            | 1/13/2012 | +1.90 / +5.00% | 39.90 | 39.90 | 39.90 | 39.90 | 39.90 | 3.99 | 10 |   |  
            | 1/12/2012 | -2.00 / -5.00% | 38.00 | 38.00 | 38.00 | 38.00 | 38.00 | 3.80 | 4,800 |   |  			
            | 1/11/2012 | -1.90 / -4.53% | 41.90 | 41.90 | 40.00 | 40.00 | 40.00 | 4.01 | 10,500 |   |  
            | 1/10/2012 | -0.10 / -0.24% | 41.90 | 41.90 | 41.90 | 41.90 | 41.90 | 4.20 | 12,000 |   |  			
            | 1/9/2012 | 0.00 / 0.00% | 40.00 | 42.00 | 40.00 | 42.00 | 42.00 | 4.21 | 2,120 |   |  
            | 1/6/2012 | -0.50 / -1.18% | 42.40 | 42.40 | 42.00 | 42.00 | 42.00 | 4.21 | 3,000 |   |  			
            | 1/5/2012 | 0.00 / 0.00% | 42.50 | 42.50 | 42.50 | 42.50 | 42.50 | 4.26 | 1,020 |   |  
            | 1/4/2012 | +1.90 / +4.68% | 41.00 | 42.50 | 40.50 | 42.50 | 42.50 | 4.26 | 5,010 |   |  |