| 
                 
                    Closing price on 10/28/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    45.00 | 
                 
                
                    | High | 
                    45.00 | 
                 
                
                    | Low | 
                    45.00 | 
                     
                
                    | Volume | 
                    2,000 | 
                                 
                
                    | Split-adjusted Price | 
                    4.51 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IMP Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                10/27/2011
             | 
            
                0.00 / 0.00%
             |             
            
                43.10
             |           
            
                45.00
             |               
            
                43.10
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                1,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/26/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                6,850
             |            
            
                 
             |                                       
         
    
        
            | 
                10/25/2011
             | 
            
                +0.50 / +1.12%
             |             
            
                44.50
             |           
            
                45.00
             |               
            
                44.50
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                3,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/24/2011
             | 
            
                -0.50 / -1.11%
             |             
            
                44.50
             |           
            
                44.50
             |               
            
                44.50
             |                           
            
                44.50
             | 
            
                44.50
             |                     
            
                4.46
             |                                 
            
                640
             |            
            
                 
             |                                       
         
    
        
            | 
                10/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                1,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/20/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                2,420
             |            
            
                 
             |                                       
         
    
        
            | 
                10/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                5,000
             |            
            
                 
             |                                       
         
    
        
            | 
                10/17/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                10
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                2,400
             |            
            
                 
             |                                       
         
    
        
            | 
                10/13/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/12/2011
             | 
            
                -0.50 / -1.10%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                10/11/2011
             | 
            
                -0.50 / -1.09%
             |             
            
                45.40
             |           
            
                45.50
             |               
            
                45.00
             |                           
            
                45.50
             | 
            
                45.50
             |                     
            
                4.56
             |                                 
            
                8,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/10/2011
             | 
            
                +0.50 / +1.10%
             |             
            
                43.60
             |           
            
                46.00
             |               
            
                43.30
             |                           
            
                46.00
             | 
            
                46.00
             |                     
            
                4.61
             |                                 
            
                450
             |            
            
                 
             |                                       
         
    
        
            | 
                10/7/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.50
             |           
            
                45.50
             |               
            
                45.50
             |                           
            
                45.50
             | 
            
                45.50
             |                     
            
                4.56
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/6/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.50
             |           
            
                45.50
             |               
            
                45.50
             |                           
            
                45.50
             | 
            
                45.50
             |                     
            
                4.56
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                10/5/2011
             | 
            
                -0.50 / -1.09%
             |             
            
                44.00
             |           
            
                45.50
             |               
            
                44.00
             |                           
            
                45.50
             | 
            
                45.50
             |                     
            
                4.56
             |                                 
            
                350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/4/2011
             | 
            
                +1.20 / +2.68%
             |             
            
                43.50
             |           
            
                46.00
             |               
            
                43.50
             |                           
            
                46.00
             | 
            
                46.00
             |                     
            
                4.61
             |                                 
            
                470
             |            
            
                 
             |                                       
         
    
        
            | 
                10/3/2011
             | 
            
                -0.20 / -0.44%
             |             
            
                44.80
             |           
            
                44.80
             |               
            
                44.80
             |                           
            
                44.80
             | 
            
                44.80
             |                     
            
                4.49
             |                                 
            
                1,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/30/2011
             | 
            
                -0.50 / -1.10%
             |             
            
                45.50
             |           
            
                45.50
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.51
             |                                 
            
                5,260
             |            
            
                 
             |                                       
         
    
        
            | 
                9/29/2011
             | 
            
                0.00 / 0.00%
             |             
            
                45.50
             |           
            
                45.50
             |               
            
                45.50
             |                           
            
                45.50
             | 
            
                45.50
             |                     
            
                4.56
             |                                 
            
                600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/28/2011
             | 
            
                -0.50 / -1.09%
             |             
            
                45.50
             |           
            
                46.00
             |               
            
                45.50
             |                           
            
                45.50
             | 
            
                45.50
             |                     
            
                4.56
             |                                 
            
                1,110
             |            
            
                 
             |                                       
         
    
        
            | 
                9/27/2011
             | 
            
                0.00 / 0.00%
             |             
            
                44.00
             |           
            
                46.00
             |               
            
                44.00
             |                           
            
                46.00
             | 
            
                46.00
             |                     
            
                4.61
             |                                 
            
                110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/26/2011
             | 
            
                +1.40 / +3.14%
             |             
            
                44.60
             |           
            
                46.00
             |               
            
                44.50
             |                           
            
                46.00
             | 
            
                46.00
             |                     
            
                4.61
             |                                 
            
                370
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2011
             | 
            
                -2.00 / -4.29%
             |             
            
                44.50
             |           
            
                44.60
             |               
            
                44.50
             |                           
            
                44.60
             | 
            
                44.60
             |                     
            
                4.47
             |                                 
            
                530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/22/2011
             | 
            
                0.00 / 0.00%
             |             
            
                44.50
             |           
            
                46.60
             |               
            
                44.50
             |                           
            
                46.60
             | 
            
                46.60
             |                     
            
                4.67
             |                                 
            
                1,710
             |            
            
                 
             |                                       
         
    
        
            | 
                9/21/2011
             | 
            
                -2.40 / -4.90%
             |             
            
                47.00
             |           
            
                47.00
             |               
            
                46.60
             |                           
            
                46.60
             | 
            
                46.60
             |                     
            
                4.67
             |                                 
            
                11,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/20/2011
             | 
            
                +1.70 / +3.59%
             |             
            
                46.50
             |           
            
                49.00
             |               
            
                46.50
             |                           
            
                49.00
             | 
            
                49.00
             |                     
            
                4.91
             |                                 
            
                7,150
             |            
            
                 
             |                                       
         
    
        
            | 
                9/19/2011
             | 
            
                +0.20 / +0.42%
             |             
            
                45.00
             |           
            
                47.40
             |               
            
                45.00
             |                           
            
                47.30
             | 
            
                47.30
             |                     
            
                4.74
             |                                 
            
                10,010
             |  
            
                 
             |                                                              
             
    
         
    
    
 |