| 
                 
                    Closing price on 4/20/2009
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    29.90 | 
                 
                
                    | High | 
                    29.90 | 
                 
                
                    | Low | 
                    29.90 | 
                     
                
                    | Volume | 
                    20,880 | 
                                 
                
                    | Split-adjusted Price | 
                    9.30 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NBB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/20/2009
             | 
            
                -1.50 / -4.78%
             |             
            
                29.90
             |           
            
                29.90
             |               
            
                29.90
             |                           
            
                29.90
             | 
            
                29.90
             |                     
            
                9.30
             |                                 
            
                20,880
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2009
             | 
            
                -1.60 / -4.85%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                31.40
             |                           
            
                31.40
             | 
            
                31.40
             |                     
            
                9.76
             |                                 
            
                90,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2009
             | 
            
                0.00 / 0.00%
             |             
            
                34.60
             |           
            
                34.60
             |               
            
                32.00
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                10.26
             |                                 
            
                165,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2009
             | 
            
                +1.50 / +4.76%
             |             
            
                31.50
             |           
            
                33.00
             |               
            
                31.50
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                10.26
             |                                 
            
                346,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2009
             | 
            
                +1.50 / +5.00%
             |             
            
                30.00
             |           
            
                31.50
             |               
            
                29.90
             |                           
            
                31.50
             | 
            
                31.50
             |                     
            
                9.79
             |                                 
            
                163,690
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2009
             | 
            
                +1.40 / +4.90%
             |             
            
                30.00
             |           
            
                30.00
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.00
             |                     
            
                9.33
             |                                 
            
                13,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2009
             | 
            
                +1.30 / +4.76%
             |             
            
                28.60
             |           
            
                28.60
             |               
            
                28.60
             |                           
            
                28.60
             | 
            
                28.60
             |                     
            
                8.89
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2009
             | 
            
                +1.30 / +5.00%
             |             
            
                27.30
             |           
            
                27.30
             |               
            
                27.00
             |                           
            
                27.30
             | 
            
                27.30
             |                     
            
                8.49
             |                                 
            
                298,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2009
             | 
            
                -1.30 / -4.76%
             |             
            
                28.40
             |           
            
                28.40
             |               
            
                26.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                8.08
             |                                 
            
                85,740
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2009
             | 
            
                +1.30 / +5.00%
             |             
            
                26.00
             |           
            
                27.30
             |               
            
                25.40
             |                           
            
                27.30
             | 
            
                27.30
             |                     
            
                8.49
             |                                 
            
                255,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2009
             | 
            
                +0.80 / +3.17%
             |             
            
                25.20
             |           
            
                26.00
             |               
            
                25.10
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                8.08
             |                                 
            
                172,740
             |            
            
                 
             |                                       
         
    
        
            | 
                4/2/2009
             | 
            
                -0.30 / -1.18%
             |             
            
                25.50
             |           
            
                25.50
             |               
            
                24.60
             |                           
            
                25.20
             | 
            
                25.20
             |                     
            
                7.83
             |                                 
            
                39,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2009
             | 
            
                +0.10 / +0.39%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                25.50
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                7.93
             |                                 
            
                64,550
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2009
             | 
            
                -0.60 / -2.31%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                25.40
             |                           
            
                25.40
             | 
            
                25.40
             |                     
            
                7.90
             |                                 
            
                68,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2009
             | 
            
                0.00 / 0.00%
             |             
            
                25.50
             |           
            
                26.20
             |               
            
                25.50
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                8.08
             |                                 
            
                26,830
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2009
             | 
            
                -0.10 / -0.38%
             |             
            
                26.10
             |           
            
                26.20
             |               
            
                26.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                8.08
             |                                 
            
                53,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2009
             | 
            
                +0.10 / +0.38%
             |             
            
                26.00
             |           
            
                26.30
             |               
            
                26.00
             |                           
            
                26.10
             | 
            
                26.10
             |                     
            
                8.11
             |                                 
            
                56,810
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2009
             | 
            
                -0.30 / -1.14%
             |             
            
                26.10
             |           
            
                26.10
             |               
            
                25.40
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                8.08
             |                                 
            
                54,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2009
             | 
            
                +1.10 / +4.37%
             |             
            
                25.20
             |           
            
                26.40
             |               
            
                25.20
             |                           
            
                26.30
             | 
            
                26.30
             |                     
            
                7.74
             |                                 
            
                70,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2009
             | 
            
                +0.10 / +0.40%
             |             
            
                25.00
             |           
            
                26.00
             |               
            
                25.00
             |                           
            
                25.20
             | 
            
                25.20
             |                     
            
                7.42
             |                                 
            
                91,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2009
             | 
            
                -0.70 / -2.71%
             |             
            
                25.20
             |           
            
                25.60
             |               
            
                24.70
             |                           
            
                25.10
             | 
            
                25.10
             |                     
            
                7.39
             |                                 
            
                45,560
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2009
             | 
            
                0.00 / 0.00%
             |             
            
                25.20
             |           
            
                25.90
             |               
            
                25.20
             |                           
            
                25.80
             | 
            
                25.80
             |                     
            
                7.59
             |                                 
            
                63,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2009
             | 
            
                0.00 / 0.00%
             |             
            
                26.30
             |           
            
                26.30
             |               
            
                25.40
             |                           
            
                25.80
             | 
            
                25.80
             |                     
            
                7.59
             |                                 
            
                58,160
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2009
             | 
            
                +0.60 / +2.38%
             |             
            
                25.60
             |           
            
                25.80
             |               
            
                25.30
             |                           
            
                25.80
             | 
            
                25.80
             |                     
            
                7.59
             |                                 
            
                46,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2009
             | 
            
                +0.70 / +2.86%
             |             
            
                25.50
             |           
            
                25.50
             |               
            
                24.80
             |                           
            
                25.20
             | 
            
                25.20
             |                     
            
                7.42
             |                                 
            
                48,640
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2009
             | 
            
                +0.40 / +1.66%
             |             
            
                24.80
             |           
            
                24.80
             |               
            
                24.00
             |                           
            
                24.50
             | 
            
                24.50
             |                     
            
                7.21
             |                                 
            
                31,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2009
             | 
            
                +1.10 / +4.78%
             |             
            
                23.00
             |           
            
                24.10
             |               
            
                22.50
             |                           
            
                24.10
             | 
            
                24.10
             |                     
            
                7.09
             |                                 
            
                102,530
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2009
             | 
            
                +0.50 / +2.22%
             |             
            
                22.50
             |           
            
                23.20
             |               
            
                22.50
             |                           
            
                23.00
             | 
            
                23.00
             |                     
            
                6.77
             |                                 
            
                105,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2009
             | 
            
                +0.20 / +0.90%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.00
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                6.62
             |                                 
            
                39,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2009
             | 
            
                +0.10 / +0.45%
             |             
            
                22.70
             |           
            
                23.30
             |               
            
                22.00
             |                           
            
                22.30
             | 
            
                22.30
             |                     
            
                6.56
             |                                 
            
                62,000
             |  
            
                 
             |                                                              
             
    
         
    
    
 |