| 
                 
                    Closing price on 8/22/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    36.10 | 
                 
                
                    | High | 
                    36.80 | 
                 
                
                    | Low | 
                    36.00 | 
                     
                
                    | Volume | 
                    27,300 | 
                                 
                
                    | Split-adjusted Price | 
                    4.46 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IMP Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/22/2013
             | 
            
                -0.70 / -1.91%
             |             
            
                36.10
             |           
            
                36.80
             |               
            
                36.00
             |                           
            
                36.00
             | 
            
                36.00
             |                     
            
                4.46
             |                                 
            
                27,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/21/2013
             | 
            
                +0.50 / +1.38%
             |             
            
                36.00
             |           
            
                37.00
             |               
            
                35.90
             |                           
            
                36.70
             | 
            
                36.70
             |                     
            
                4.55
             |                                 
            
                30,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2013
             | 
            
                0.00 / 0.00%
             |             
            
                36.90
             |           
            
                36.90
             |               
            
                35.90
             |                           
            
                36.20
             | 
            
                36.20
             |                     
            
                4.49
             |                                 
            
                12,860
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2013
             | 
            
                +0.10 / +0.28%
             |             
            
                36.70
             |           
            
                37.20
             |               
            
                36.10
             |                           
            
                36.20
             | 
            
                36.20
             |                     
            
                4.49
             |                                 
            
                17,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2013
             | 
            
                -1.10 / -2.96%
             |             
            
                37.40
             |           
            
                37.40
             |               
            
                36.00
             |                           
            
                36.10
             | 
            
                36.10
             |                     
            
                4.48
             |                                 
            
                22,570
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2013
             | 
            
                +0.20 / +0.54%
             |             
            
                37.70
             |           
            
                37.80
             |               
            
                37.00
             |                           
            
                37.20
             | 
            
                37.20
             |                     
            
                4.61
             |                                 
            
                20,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2013
             | 
            
                0.00 / 0.00%
             |             
            
                37.00
             |           
            
                37.20
             |               
            
                36.60
             |                           
            
                37.00
             | 
            
                37.00
             |                     
            
                4.59
             |                                 
            
                9,420
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2013
             | 
            
                +0.30 / +0.82%
             |             
            
                36.70
             |           
            
                37.80
             |               
            
                35.80
             |                           
            
                37.00
             | 
            
                37.00
             |                     
            
                4.59
             |                                 
            
                33,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2013
             | 
            
                +0.50 / +1.38%
             |             
            
                36.20
             |           
            
                37.00
             |               
            
                35.60
             |                           
            
                36.70
             | 
            
                36.70
             |                     
            
                4.55
             |                                 
            
                7,090
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2013
             | 
            
                -0.80 / -2.16%
             |             
            
                37.00
             |           
            
                37.00
             |               
            
                36.20
             |                           
            
                36.20
             | 
            
                36.20
             |                     
            
                4.49
             |                                 
            
                15,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2013
             | 
            
                -1.00 / -2.63%
             |             
            
                37.50
             |           
            
                37.90
             |               
            
                36.80
             |                           
            
                37.00
             | 
            
                37.00
             |                     
            
                4.59
             |                                 
            
                25,610
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2013
             | 
            
                +0.40 / +1.06%
             |             
            
                38.30
             |           
            
                38.30
             |               
            
                37.60
             |                           
            
                38.00
             | 
            
                38.00
             |                     
            
                4.71
             |                                 
            
                14,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2013
             | 
            
                +1.30 / +3.58%
             |             
            
                36.50
             |           
            
                38.60
             |               
            
                36.50
             |                           
            
                37.60
             | 
            
                37.60
             |                     
            
                4.66
             |                                 
            
                79,460
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2013
             | 
            
                +0.80 / +2.25%
             |             
            
                35.50
             |           
            
                37.00
             |               
            
                35.50
             |                           
            
                36.30
             | 
            
                36.30
             |                     
            
                4.50
             |                                 
            
                55,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2013
             | 
            
                0.00 / 0.00%
             |             
            
                34.40
             |           
            
                35.50
             |               
            
                34.40
             |                           
            
                35.50
             | 
            
                35.50
             |                     
            
                4.40
             |                                 
            
                3,120
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2013
             | 
            
                0.00 / 0.00%
             |             
            
                35.50
             |           
            
                35.50
             |               
            
                35.50
             |                           
            
                35.50
             | 
            
                35.50
             |                     
            
                4.40
             |                                 
            
                6,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/31/2013
             | 
            
                0.00 / 0.00%
             |             
            
                35.10
             |           
            
                35.50
             |               
            
                34.10
             |                           
            
                35.50
             | 
            
                35.50
             |                     
            
                4.40
             |                                 
            
                25,460
             |            
            
                 
             |                                       
         
    
        
            | 
                7/30/2013
             | 
            
                +0.10 / +0.28%
             |             
            
                34.70
             |           
            
                35.50
             |               
            
                34.70
             |                           
            
                35.50
             | 
            
                35.50
             |                     
            
                4.40
             |                                 
            
                4,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/29/2013
             | 
            
                -0.50 / -1.39%
             |             
            
                36.00
             |           
            
                36.00
             |               
            
                34.70
             |                           
            
                35.40
             | 
            
                35.40
             |                     
            
                4.39
             |                                 
            
                14,920
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2013
             | 
            
                +0.20 / +0.56%
             |             
            
                36.00
             |           
            
                36.00
             |               
            
                35.50
             |                           
            
                35.90
             | 
            
                35.90
             |                     
            
                4.45
             |                                 
            
                5,430
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2013
             | 
            
                -1.20 / -3.25%
             |             
            
                35.10
             |           
            
                36.90
             |               
            
                35.10
             |                           
            
                35.70
             | 
            
                35.70
             |                     
            
                4.43
             |                                 
            
                12,750
             |            
            
                 
             |                                       
         
    
        
            | 
                7/24/2013
             | 
            
                -0.80 / -2.12%
             |             
            
                37.70
             |           
            
                38.00
             |               
            
                36.30
             |                           
            
                36.90
             | 
            
                36.90
             |                     
            
                4.58
             |                                 
            
                13,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/23/2013
             | 
            
                +1.70 / +4.72%
             |             
            
                36.00
             |           
            
                38.40
             |               
            
                36.00
             |                           
            
                37.70
             | 
            
                37.70
             |                     
            
                4.68
             |                                 
            
                59,970
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2013
             | 
            
                +1.30 / +3.75%
             |             
            
                34.90
             |           
            
                36.00
             |               
            
                34.60
             |                           
            
                36.00
             | 
            
                36.00
             |                     
            
                4.46
             |                                 
            
                72,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2013
             | 
            
                +0.20 / +0.58%
             |             
            
                34.50
             |           
            
                34.80
             |               
            
                34.20
             |                           
            
                34.70
             | 
            
                34.70
             |                     
            
                4.30
             |                                 
            
                11,820
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2013
             | 
            
                0.00 / 0.00%
             |             
            
                34.50
             |           
            
                34.60
             |               
            
                34.20
             |                           
            
                34.50
             | 
            
                34.50
             |                     
            
                4.28
             |                                 
            
                2,610
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/17/2013
             | 
            
                +0.40 / +1.17%
             |             
            
                34.90
             |           
            
                34.90
             |               
            
                34.20
             |                           
            
                34.50
             | 
            
                34.50
             |                     
            
                4.28
             |                                 
            
                2,670
             |            
            
                 
             |                                       
         
    
        
            | 
                7/16/2013
             | 
            
                0.00 / 0.00%
             |             
            
                34.60
             |           
            
                34.60
             |               
            
                34.00
             |                           
            
                34.10
             | 
            
                34.10
             |                     
            
                4.23
             |                                 
            
                3,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2013
             | 
            
                -0.80 / -2.29%
             |             
            
                34.20
             |           
            
                35.00
             |               
            
                34.10
             |                           
            
                34.10
             | 
            
                34.10
             |                     
            
                4.23
             |                                 
            
                12,650
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2013
             | 
            
                +0.10 / +0.29%
             |             
            
                34.80
             |           
            
                36.00
             |               
            
                34.80
             |                           
            
                34.90
             | 
            
                34.90
             |                     
            
                4.33
             |                                 
            
                1,770
             |  
            
                 
             |                                                              
             
    
         
    
    
 |