| 
                 
                    Closing price on 8/10/2007
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    44.50 | 
                 
                
                    | High | 
                    45.40 | 
                 
                
                    | Low | 
                    44.00 | 
                     
                
                    | Volume | 
                    6,230 | 
                                 
                
                    | Split-adjusted Price | 
                    4.10 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NHC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/10/2007
             | 
            
                +0.90 / +2.02%
             |             
            
                44.50
             |           
            
                45.40
             |               
            
                44.00
             |                           
            
                45.40
             | 
            
                45.40
             |                     
            
                4.10
             |                                 
            
                6,230
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2007
             | 
            
                0.00 / 0.00%
             |             
            
                44.50
             |           
            
                44.50
             |               
            
                44.00
             |                           
            
                44.50
             | 
            
                44.50
             |                     
            
                4.02
             |                                 
            
                4,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2007
             | 
            
                -1.50 / -3.26%
             |             
            
                44.00
             |           
            
                45.40
             |               
            
                44.00
             |                           
            
                44.50
             | 
            
                44.50
             |                     
            
                4.02
             |                                 
            
                3,330
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2007
             | 
            
                0.00 / 0.00%
             |             
            
                43.80
             |           
            
                46.00
             |               
            
                43.80
             |                           
            
                46.00
             | 
            
                46.00
             |                     
            
                4.15
             |                                 
            
                4,430
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2007
             | 
            
                +1.00 / +2.22%
             |             
            
                46.10
             |           
            
                46.10
             |               
            
                45.00
             |                           
            
                46.00
             | 
            
                46.00
             |                     
            
                4.15
             |                                 
            
                7,280
             |            
            
                 
             |                                       
         
    
        
            | 
                8/3/2007
             | 
            
                +1.40 / +3.21%
             |             
            
                45.50
             |           
            
                45.50
             |               
            
                45.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.06
             |                                 
            
                310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2007
             | 
            
                -2.20 / -4.80%
             |             
            
                47.40
             |           
            
                47.40
             |               
            
                43.60
             |                           
            
                43.60
             | 
            
                43.60
             |                     
            
                3.94
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2007
             | 
            
                +0.80 / +1.78%
             |             
            
                45.80
             |           
            
                47.00
             |               
            
                45.80
             |                           
            
                45.80
             | 
            
                45.80
             |                     
            
                4.13
             |                                 
            
                7,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/31/2007
             | 
            
                -1.00 / -2.17%
             |             
            
                46.00
             |           
            
                46.00
             |               
            
                44.00
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                4.06
             |                                 
            
                2,250
             |            
            
                 
             |                                       
         
    
        
            | 
                7/30/2007
             | 
            
                -0.50 / -1.08%
             |             
            
                46.00
             |           
            
                46.00
             |               
            
                46.00
             |                           
            
                46.00
             | 
            
                46.00
             |                     
            
                4.15
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/27/2007
             | 
            
                -0.40 / -0.85%
             |             
            
                46.90
             |           
            
                47.00
             |               
            
                46.50
             |                           
            
                46.50
             | 
            
                46.50
             |                     
            
                4.20
             |                                 
            
                1,230
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2007
             | 
            
                +0.20 / +0.43%
             |             
            
                46.70
             |           
            
                46.90
             |               
            
                46.00
             |                           
            
                46.90
             | 
            
                46.90
             |                     
            
                4.23
             |                                 
            
                550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2007
             | 
            
                -2.30 / -4.69%
             |             
            
                46.70
             |           
            
                46.70
             |               
            
                46.70
             |                           
            
                46.70
             | 
            
                46.70
             |                     
            
                4.22
             |                                 
            
                4,250
             |            
            
                 
             |                                       
         
    
        
            | 
                7/24/2007
             | 
            
                +0.70 / +1.45%
             |             
            
                49.00
             |           
            
                50.50
             |               
            
                49.00
             |                           
            
                49.00
             | 
            
                49.00
             |                     
            
                4.42
             |                                 
            
                14,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/23/2007
             | 
            
                +2.30 / +5.00%
             |             
            
                48.30
             |           
            
                48.30
             |               
            
                48.30
             |                           
            
                48.30
             | 
            
                48.30
             |                     
            
                4.36
             |                                 
            
                5,230
             |            
            
                 
             |                                       
         
    
        
            | 
                7/20/2007
             | 
            
                +0.50 / +1.10%
             |             
            
                45.50
             |           
            
                46.00
             |               
            
                44.00
             |                           
            
                46.00
             | 
            
                46.00
             |                     
            
                4.15
             |                                 
            
                10,430
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2007
             | 
            
                -0.30 / -0.66%
             |             
            
                45.80
             |           
            
                45.80
             |               
            
                45.50
             |                           
            
                45.50
             | 
            
                45.50
             |                     
            
                4.11
             |                                 
            
                3,690
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2007
             | 
            
                -0.70 / -1.51%
             |             
            
                46.50
             |           
            
                46.50
             |               
            
                45.80
             |                           
            
                45.80
             | 
            
                45.80
             |                     
            
                4.13
             |                                 
            
                2,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/17/2007
             | 
            
                -0.30 / -0.64%
             |             
            
                46.50
             |           
            
                46.50
             |               
            
                46.10
             |                           
            
                46.50
             | 
            
                46.50
             |                     
            
                4.20
             |                                 
            
                3,170
             |            
            
                 
             |                                       
         
    
        
            | 
                7/16/2007
             | 
            
                -0.20 / -0.43%
             |             
            
                47.00
             |           
            
                47.00
             |               
            
                46.80
             |                           
            
                46.80
             | 
            
                46.80
             |                     
            
                4.22
             |                                 
            
                2,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2007
             | 
            
                +0.50 / +1.08%
             |             
            
                46.50
             |           
            
                47.00
             |               
            
                46.00
             |                           
            
                47.00
             | 
            
                47.00
             |                     
            
                4.24
             |                                 
            
                680
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2007
             | 
            
                -0.50 / -1.06%
             |             
            
                47.00
             |           
            
                47.00
             |               
            
                46.50
             |                           
            
                46.50
             | 
            
                46.50
             |                     
            
                4.20
             |                                 
            
                2,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2007
             | 
            
                0.00 / 0.00%
             |             
            
                47.00
             |           
            
                47.00
             |               
            
                47.00
             |                           
            
                47.00
             | 
            
                47.00
             |                     
            
                4.24
             |                                 
            
                4,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/10/2007
             | 
            
                0.00 / 0.00%
             |             
            
                47.00
             |           
            
                47.00
             |               
            
                47.00
             |                           
            
                47.00
             | 
            
                47.00
             |                     
            
                4.24
             |                                 
            
                2,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/9/2007
             | 
            
                0.00 / 0.00%
             |             
            
                47.00
             |           
            
                47.00
             |               
            
                47.00
             |                           
            
                47.00
             | 
            
                47.00
             |                     
            
                4.24
             |                                 
            
                4,310
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2007
             | 
            
                -0.50 / -1.05%
             |             
            
                47.50
             |           
            
                47.50
             |               
            
                47.00
             |                           
            
                47.00
             | 
            
                47.00
             |                     
            
                4.24
             |                                 
            
                800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2007
             | 
            
                -0.30 / -0.63%
             |             
            
                47.50
             |           
            
                47.50
             |               
            
                47.50
             |                           
            
                47.50
             | 
            
                47.50
             |                     
            
                4.29
             |                                 
            
                730
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2007
             | 
            
                +2.20 / +4.82%
             |             
            
                47.80
             |           
            
                47.80
             |               
            
                47.80
             |                           
            
                47.80
             | 
            
                47.80
             |                     
            
                4.31
             |                                 
            
                1,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/3/2007
             | 
            
                -2.40 / -5.00%
             |             
            
                46.10
             |           
            
                46.10
             |               
            
                45.60
             |                           
            
                45.60
             | 
            
                45.60
             |                     
            
                4.12
             |                                 
            
                3,580
             |            
            
                 
             |                                       
         
    
        
            | 
                7/2/2007
             | 
            
                -2.00 / -4.00%
             |             
            
                50.00
             |           
            
                50.00
             |               
            
                48.00
             |                           
            
                48.00
             | 
            
                48.00
             |                     
            
                4.33
             |                                 
            
                3,130
             |  
            
                 
             |                                                              
             
    
         
    
    
 |