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                    Closing price on 1/31/2012
                 |  |  
    
        |           
                
                    | Open | 42.50 |  
                    | High | 42.50 |  
                    | Low | 41.50 |  
                    | Volume | 35,770 |  
                    | Split-adjusted Price | 4.24 |  
                
             | 
 |  IMP Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 1/3/2012 | +1.90 / +4.91% | 39.00 | 40.60 | 39.00 | 40.60 | 40.60 | 4.07 | 20 |   |  			
            | 12/30/2011 | +1.80 / +4.88% | 35.10 | 38.70 | 35.10 | 38.70 | 38.70 | 3.87 | 20,180 |   |  
            | 12/29/2011 | -1.90 / -4.90% | 36.90 | 36.90 | 36.90 | 36.90 | 36.90 | 3.69 | 7,210 |   |  			
            | 12/28/2011 | +0.20 / +0.52% | 38.60 | 38.90 | 38.60 | 38.80 | 38.80 | 3.88 | 1,810 |   |  
            | 12/27/2011 | 0.00 / 0.00% | 38.60 | 38.60 | 38.00 | 38.60 | 38.60 | 3.86 | 12,510 |   |  			
            | 12/26/2011 | +0.20 / +0.52% | 38.00 | 38.60 | 38.00 | 38.60 | 38.60 | 3.86 | 10,760 |   |  
            | 12/23/2011 | +0.30 / +0.79% | 38.00 | 38.40 | 38.00 | 38.40 | 38.40 | 3.84 | 2,610 |   |  			
            | 12/22/2011 | +1.80 / +4.96% | 36.00 | 38.10 | 36.00 | 38.10 | 38.10 | 3.81 | 13,230 |   |  
            | 12/21/2011 | 0.00 / 0.00% | 36.00 | 36.40 | 36.00 | 36.30 | 36.30 | 3.63 | 4,100 |   |  			
            | 12/20/2011 | 0.00 / 0.00% | 36.50 | 36.50 | 36.30 | 36.30 | 36.30 | 3.63 | 11,200 |   |  
            | 12/19/2011 | -0.20 / -0.55% | 36.20 | 36.50 | 35.50 | 36.30 | 36.30 | 3.63 | 10,960 |   |  			
            | 12/16/2011 | 0.00 / 0.00% | 36.00 | 36.50 | 35.00 | 36.50 | 36.50 | 3.65 | 9,710 |   |  
            | 12/15/2011 | +0.50 / +1.39% | 35.10 | 36.50 | 35.10 | 36.50 | 36.50 | 3.65 | 6,760 |   |  			
            | 12/14/2011 | +0.10 / +0.28% | 36.50 | 36.50 | 35.50 | 36.00 | 36.00 | 3.60 | 10,540 |   |  
            | 12/13/2011 | +0.40 / +1.13% | 36.00 | 36.00 | 35.80 | 35.90 | 35.90 | 3.59 | 2,390 |   |  |