| 
    
        
            | 
                    Closing price on 2/26/2013
                 |  |  
    
        |           
                
                    | Open | 34.90 |  
                    | High | 35.00 |  
                    | Low | 34.00 |  
                    | Volume | 104,120 |  
                    | Split-adjusted Price | 4.09 |  
                
             | 
 |  IMP Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 2/26/2013 | 0.00 / 0.00% | 34.90 | 35.00 | 34.00 | 34.00 | 34.00 | 4.09 | 104,120 |   |  
            | 2/25/2013 | -0.50 / -1.45% | 34.00 | 34.40 | 34.00 | 34.00 | 34.00 | 4.09 | 980 |   |  			
            | 2/22/2013 | +0.50 / +1.47% | 34.90 | 34.90 | 33.70 | 34.50 | 34.50 | 4.15 | 51,970 |   |  
            | 2/21/2013 | -0.80 / -2.30% | 34.50 | 34.70 | 34.00 | 34.00 | 34.00 | 4.09 | 24,080 |   |  			
            | 2/20/2013 | +0.70 / +2.05% | 35.00 | 35.00 | 34.20 | 34.80 | 34.80 | 4.18 | 238,240 |   |  
            | 2/19/2013 | -0.90 / -2.57% | 34.50 | 34.50 | 34.10 | 34.10 | 34.10 | 4.10 | 40,220 |   |  			
            | 2/18/2013 | +1.40 / +4.17% | 35.90 | 35.90 | 33.60 | 35.00 | 35.00 | 4.21 | 4,360 |   |  
            | 2/8/2013 | -1.20 / -3.45% | 33.60 | 33.60 | 33.60 | 33.60 | 33.60 | 4.04 | 10 |   |  			
            | 2/7/2013 | -0.10 / -0.29% | 35.40 | 35.40 | 32.80 | 34.80 | 34.80 | 4.18 | 2,670 |   |  
            | 2/6/2013 | 0.00 / 0.00% | 35.30 | 35.30 | 34.90 | 34.90 | 34.90 | 4.19 | 380 |   |  			
            | 2/5/2013 | -0.50 / -1.41% | 35.00 | 35.00 | 33.20 | 34.90 | 34.90 | 4.19 | 540 |   |  
            | 2/4/2013 | +0.90 / +2.61% | 35.40 | 35.40 | 35.40 | 35.40 | 35.40 | 4.25 | 68,480 |   |  			
            | 2/1/2013 | +0.50 / +1.47% | 34.00 | 34.50 | 34.00 | 34.50 | 34.50 | 4.15 | 131,210 |   |  
            | 1/31/2013 | -0.50 / -1.45% | 34.50 | 34.50 | 32.50 | 34.00 | 34.00 | 4.09 | 4,350 |   |  			
            | 1/30/2013 | 0.00 / 0.00% | 34.90 | 34.90 | 33.30 | 34.50 | 34.50 | 4.15 | 52,050 |   |  
            | 1/29/2013 | -0.50 / -1.43% | 35.00 | 35.00 | 32.60 | 34.50 | 34.50 | 4.15 | 11,470 |   |  			
            | 1/28/2013 | -0.10 / -0.28% | 35.10 | 35.40 | 33.10 | 35.00 | 35.00 | 4.21 | 27,970 |   |  
            | 1/25/2013 | -0.20 / -0.57% | 35.50 | 35.50 | 34.90 | 35.10 | 35.10 | 4.22 | 11,360 |   |  			
            | 1/24/2013 | +0.80 / +2.32% | 34.50 | 35.30 | 34.50 | 35.30 | 35.30 | 4.24 | 8,100 |   |  
            | 1/23/2013 | +0.40 / +1.17% | 34.00 | 34.50 | 33.90 | 34.50 | 34.50 | 4.15 | 11,950 |   |  			
            | 1/22/2013 | -0.40 / -1.16% | 35.00 | 35.00 | 34.00 | 34.10 | 34.10 | 4.10 | 12,940 |   |  
            | 1/21/2013 | +0.50 / +1.47% | 34.50 | 34.50 | 33.80 | 34.50 | 34.50 | 4.15 | 56,970 |   |  			
            | 1/18/2013 | -0.50 / -1.45% | 34.10 | 34.10 | 34.00 | 34.00 | 34.00 | 4.09 | 2,000 |   |  
            | 1/17/2013 | -0.20 / -0.58% | 34.70 | 34.70 | 34.00 | 34.50 | 34.50 | 4.15 | 23,000 |   |  			
            | 1/16/2013 | 0.00 / 0.00% | 34.70 | 34.70 | 34.00 | 34.70 | 34.70 | 4.17 | 7,200 |   |  
            | 1/15/2013 | -0.30 / -0.86% | 34.60 | 34.70 | 34.50 | 34.70 | 34.70 | 4.17 | 14,040 |   |  			
            | 1/14/2013 | 0.00 / 0.00% | 34.50 | 35.00 | 34.50 | 35.00 | 35.00 | 4.21 | 1,150 |   |  
            | 1/11/2013 | -0.20 / -0.57% | 34.30 | 35.90 | 34.30 | 35.00 | 35.00 | 4.21 | 28,650 |   |  			
            | 1/10/2013 | -0.80 / -2.22% | 35.00 | 35.90 | 35.00 | 35.20 | 35.20 | 4.23 | 13,460 |   |  
            | 1/9/2013 | +1.10 / +3.15% | 34.90 | 36.60 | 34.90 | 36.00 | 36.00 | 4.33 | 52,790 |   |  |