| 
                 
                    Closing price on 5/19/2008
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    19.50 | 
                 
                
                    | High | 
                    19.50 | 
                 
                
                    | Low | 
                    19.50 | 
                     
                
                    | Volume | 
                    2,000 | 
                                 
                
                    | Split-adjusted Price | 
                    6.82 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NGC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/19/2008
             | 
            
                -0.60 / -2.99%
             |             
            
                19.50
             |           
            
                19.50
             |               
            
                19.50
             |                           
            
                19.50
             | 
            
                19.50
             |                     
            
                6.82
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2008
             | 
            
                -0.60 / -2.90%
             |             
            
                20.10
             |           
            
                20.10
             |               
            
                20.10
             |                           
            
                20.10
             | 
            
                20.10
             |                     
            
                7.03
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2008
             | 
            
                0.00 / 0.00%
             |             
            
                20.70
             |           
            
                20.70
             |               
            
                20.70
             |                           
            
                20.70
             | 
            
                20.70
             |                     
            
                7.24
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2008
             | 
            
                0.00 / 0.00%
             |             
            
                20.70
             |           
            
                20.70
             |               
            
                20.70
             |                           
            
                20.70
             | 
            
                20.70
             |                     
            
                7.24
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2008
             | 
            
                -0.60 / -2.82%
             |             
            
                20.70
             |           
            
                20.70
             |               
            
                20.70
             |                           
            
                20.70
             | 
            
                20.70
             |                     
            
                7.24
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/12/2008
             | 
            
                -0.60 / -2.74%
             |             
            
                21.30
             |           
            
                21.30
             |               
            
                21.30
             |                           
            
                21.30
             | 
            
                21.30
             |                     
            
                7.45
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2008
             | 
            
                -0.20 / -0.90%
             |             
            
                21.90
             |           
            
                21.90
             |               
            
                21.90
             |                           
            
                21.90
             | 
            
                21.90
             |                     
            
                7.66
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2008
             | 
            
                0.00 / 0.00%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.10
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                7.73
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2008
             | 
            
                0.00 / 0.00%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.10
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                7.73
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2008
             | 
            
                0.00 / 0.00%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.10
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                7.73
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2008
             | 
            
                0.00 / 0.00%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.10
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                7.73
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/29/2008
             | 
            
                -0.60 / -2.64%
             |             
            
                22.10
             |           
            
                22.90
             |               
            
                22.10
             |                           
            
                22.10
             | 
            
                22.54
             |                     
            
                7.73
             |                                 
            
                1,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2008
             | 
            
                -0.70 / -2.99%
             |             
            
                22.70
             |           
            
                22.70
             |               
            
                22.70
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                7.94
             |                                 
            
                2,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2008
             | 
            
                -0.70 / -2.90%
             |             
            
                23.40
             |           
            
                23.40
             |               
            
                23.40
             |                           
            
                23.40
             | 
            
                23.40
             |                     
            
                8.19
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2008
             | 
            
                +0.50 / +2.12%
             |             
            
                24.10
             |           
            
                24.10
             |               
            
                24.10
             |                           
            
                24.10
             | 
            
                24.10
             |                     
            
                8.43
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2008
             | 
            
                0.00 / 0.00%
             |             
            
                24.80
             |           
            
                24.80
             |               
            
                23.60
             |                           
            
                23.60
             | 
            
                23.60
             |                     
            
                8.26
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2008
             | 
            
                0.00 / 0.00%
             |             
            
                24.80
             |           
            
                24.80
             |               
            
                23.60
             |                           
            
                23.60
             | 
            
                23.60
             |                     
            
                8.26
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2008
             | 
            
                0.00 / 0.00%
             |             
            
                24.80
             |           
            
                24.80
             |               
            
                23.60
             |                           
            
                23.60
             | 
            
                23.60
             |                     
            
                8.26
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2008
             | 
            
                -1.20 / -4.84%
             |             
            
                25.00
             |           
            
                25.00
             |               
            
                23.60
             |                           
            
                23.60
             | 
            
                24.79
             |                     
            
                8.26
             |                                 
            
                8,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2008
             | 
            
                +0.70 / +2.90%
             |             
            
                23.40
             |           
            
                24.80
             |               
            
                23.40
             |                           
            
                24.80
             | 
            
                24.30
             |                     
            
                8.67
             |                                 
            
                4,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2008
             | 
            
                -0.70 / -2.82%
             |             
            
                24.10
             |           
            
                24.10
             |               
            
                24.10
             |                           
            
                24.10
             | 
            
                24.10
             |                     
            
                8.43
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2008
             | 
            
                -0.70 / -2.75%
             |             
            
                24.80
             |           
            
                24.80
             |               
            
                24.80
             |                           
            
                24.80
             | 
            
                24.80
             |                     
            
                8.67
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2008
             | 
            
                -0.50 / -1.92%
             |             
            
                25.50
             |           
            
                25.50
             |               
            
                25.50
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                8.92
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2008
             | 
            
                +0.50 / +1.96%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                26.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                9.09
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2008
             | 
            
                +0.70 / +2.82%
             |             
            
                25.50
             |           
            
                25.50
             |               
            
                25.50
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                8.92
             |                                 
            
                7,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2008
             | 
            
                +0.70 / +2.90%
             |             
            
                24.80
             |           
            
                24.80
             |               
            
                24.80
             |                           
            
                24.80
             | 
            
                24.80
             |                     
            
                8.67
             |                                 
            
                14,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2008
             | 
            
                +0.40 / +1.69%
             |             
            
                24.10
             |           
            
                24.10
             |               
            
                24.10
             |                           
            
                24.10
             | 
            
                24.10
             |                     
            
                8.43
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2008
             | 
            
                +0.40 / +1.72%
             |             
            
                23.70
             |           
            
                23.70
             |               
            
                23.70
             |                           
            
                23.70
             | 
            
                23.70
             |                     
            
                8.29
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2008
             | 
            
                +0.40 / +1.75%
             |             
            
                23.30
             |           
            
                23.30
             |               
            
                23.30
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                8.15
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2008
             | 
            
                +0.40 / +1.78%
             |             
            
                22.90
             |           
            
                22.90
             |               
            
                22.90
             |                           
            
                22.90
             | 
            
                22.90
             |                     
            
                8.01
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |