| 
                 
                    Closing price on 4/9/2008
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    26.00 | 
                 
                
                    | High | 
                    26.00 | 
                 
                
                    | Low | 
                    26.00 | 
                     
                
                    | Volume | 
                    100 | 
                                 
                
                    | Split-adjusted Price | 
                    9.09 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NGC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2008
             | 
            
                +0.40 / +1.81%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                7.87
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2008
             | 
            
                +0.40 / +1.84%
             |             
            
                22.10
             |           
            
                22.10
             |               
            
                22.10
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                7.73
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2008
             | 
            
                -0.80 / -3.56%
             |             
            
                21.50
             |           
            
                21.70
             |               
            
                21.50
             |                           
            
                21.70
             | 
            
                21.68
             |                     
            
                7.59
             |                                 
            
                4,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2008
             | 
            
                +0.90 / +4.17%
             |             
            
                23.00
             |           
            
                23.00
             |               
            
                19.90
             |                           
            
                22.50
             | 
            
                21.33
             |                     
            
                7.87
             |                                 
            
                1,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2008
             | 
            
                -2.40 / -10.00%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                21.60
             |                           
            
                21.60
             | 
            
                22.08
             |                     
            
                7.56
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2008
             | 
            
                -0.20 / -0.83%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                24.00
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                8.40
             |                                 
            
                1,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2008
             | 
            
                -0.60 / -2.42%
             |             
            
                28.80
             |           
            
                28.80
             |               
            
                24.20
             |                           
            
                24.20
             | 
            
                26.53
             |                     
            
                8.47
             |                                 
            
                4,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2008
             | 
            
                -1.80 / -6.77%
             |             
            
                30.00
             |           
            
                30.00
             |               
            
                24.80
             |                           
            
                24.80
             | 
            
                26.43
             |                     
            
                8.67
             |                                 
            
                600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2008
             | 
            
                -3.40 / -11.33%
             |             
            
                29.90
             |           
            
                29.90
             |               
            
                26.60
             |                           
            
                26.60
             | 
            
                27.43
             |                     
            
                9.30
             |                                 
            
                400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2008
             | 
            
                0.00 / 0.00%
             |             
            
                30.00
             |           
            
                30.00
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.00
             |                     
            
                10.49
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2008
             | 
            
                +0.10 / +0.33%
             |             
            
                28.40
             |           
            
                30.00
             |               
            
                28.40
             |                           
            
                30.00
             | 
            
                29.47
             |                     
            
                10.49
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2008
             | 
            
                0.00 / 0.00%
             |             
            
                29.90
             |           
            
                29.90
             |               
            
                29.90
             |                           
            
                29.90
             | 
            
                29.90
             |                     
            
                10.46
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2008
             | 
            
                +0.20 / +0.67%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                29.90
             |                           
            
                29.90
             | 
            
                31.48
             |                     
            
                10.46
             |                                 
            
                400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2008
             | 
            
                -3.30 / -10.00%
             |             
            
                33.90
             |           
            
                33.90
             |               
            
                29.70
             |                           
            
                29.70
             | 
            
                30.60
             |                     
            
                10.39
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2008
             | 
            
                -1.00 / -2.94%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                33.00
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                11.54
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2008
             | 
            
                +1.00 / +3.03%
             |             
            
                36.30
             |           
            
                36.30
             |               
            
                34.00
             |                           
            
                34.00
             | 
            
                35.80
             |                     
            
                11.89
             |                                 
            
                8,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2008
             | 
            
                +3.00 / +10.00%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                33.00
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                11.54
             |                                 
            
                2,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2008
             | 
            
                +30.00 / +0.00%
             |             
            
                30.00
             |           
            
                30.00
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.00
             |                     
            
                10.49
             |                                 
            
                5,000
             |            
            
                 
             |                                       
         
    
         
    
    
 |