| 
                 
                    Closing price on 7/27/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    92.50 | 
                 
                
                    | High | 
                    93.00 | 
                 
                
                    | Low | 
                    92.00 | 
                     
                
                    | Volume | 
                    40,910 | 
                                 
                
                    | Split-adjusted Price | 
                    29.19 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NBB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/27/2010
             | 
            
                -0.50 / -0.54%
             |             
            
                92.50
             |           
            
                93.00
             |               
            
                92.00
             |                           
            
                92.00
             | 
            
                92.00
             |                     
            
                29.19
             |                                 
            
                40,910
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2010
             | 
            
                +0.50 / +0.54%
             |             
            
                93.00
             |           
            
                93.50
             |               
            
                92.00
             |                           
            
                92.50
             | 
            
                92.50
             |                     
            
                29.35
             |                                 
            
                54,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/23/2010
             | 
            
                -2.00 / -2.13%
             |             
            
                94.00
             |           
            
                94.00
             |               
            
                92.00
             |                           
            
                92.00
             | 
            
                92.00
             |                     
            
                29.19
             |                                 
            
                71,790
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2010
             | 
            
                -0.50 / -0.53%
             |             
            
                94.50
             |           
            
                94.50
             |               
            
                94.00
             |                           
            
                94.00
             | 
            
                94.00
             |                     
            
                29.83
             |                                 
            
                19,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/21/2010
             | 
            
                0.00 / 0.00%
             |             
            
                94.00
             |           
            
                94.50
             |               
            
                94.00
             |                           
            
                94.50
             | 
            
                94.50
             |                     
            
                29.99
             |                                 
            
                32,650
             |            
            
                 
             |                                       
         
    
        
            | 
                7/20/2010
             | 
            
                -1.00 / -1.05%
             |             
            
                95.00
             |           
            
                95.50
             |               
            
                94.50
             |                           
            
                94.50
             | 
            
                94.50
             |                     
            
                29.99
             |                                 
            
                52,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2010
             | 
            
                0.00 / 0.00%
             |             
            
                95.50
             |           
            
                96.00
             |               
            
                94.50
             |                           
            
                95.50
             | 
            
                95.50
             |                     
            
                30.30
             |                                 
            
                66,150
             |            
            
                 
             |                                       
         
    
        
            | 
                7/16/2010
             | 
            
                0.00 / 0.00%
             |             
            
                95.50
             |           
            
                96.00
             |               
            
                95.50
             |                           
            
                95.50
             | 
            
                95.50
             |                     
            
                30.30
             |                                 
            
                50,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2010
             | 
            
                -0.50 / -0.52%
             |             
            
                96.00
             |           
            
                96.00
             |               
            
                95.50
             |                           
            
                95.50
             | 
            
                95.50
             |                     
            
                30.30
             |                                 
            
                5,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2010
             | 
            
                -1.00 / -1.03%
             |             
            
                97.00
             |           
            
                97.50
             |               
            
                96.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                27,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2010
             | 
            
                +1.00 / +1.04%
             |             
            
                96.00
             |           
            
                97.00
             |               
            
                96.00
             |                           
            
                97.00
             | 
            
                97.00
             |                     
            
                30.78
             |                                 
            
                21,810
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2010
             | 
            
                0.00 / 0.00%
             |             
            
                96.00
             |           
            
                96.00
             |               
            
                95.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                41,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/9/2010
             | 
            
                0.00 / 0.00%
             |             
            
                97.00
             |           
            
                97.00
             |               
            
                96.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                41,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2010
             | 
            
                0.00 / 0.00%
             |             
            
                96.00
             |           
            
                96.00
             |               
            
                95.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                65,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2010
             | 
            
                0.00 / 0.00%
             |             
            
                95.00
             |           
            
                96.00
             |               
            
                94.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                135,610
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2010
             | 
            
                0.00 / 0.00%
             |             
            
                94.00
             |           
            
                96.00
             |               
            
                94.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                51,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2010
             | 
            
                0.00 / 0.00%
             |             
            
                98.00
             |           
            
                98.00
             |               
            
                94.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                64,010
             |            
            
                 
             |                                       
         
    
        
            | 
                7/2/2010
             | 
            
                -1.00 / -1.03%
             |             
            
                99.50
             |           
            
                99.50
             |               
            
                94.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                28,430
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2010
             | 
            
                +1.00 / +1.04%
             |             
            
                98.00
             |           
            
                98.00
             |               
            
                96.00
             |                           
            
                97.00
             | 
            
                97.00
             |                     
            
                30.78
             |                                 
            
                89,020
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2010
             | 
            
                -4.00 / -4.00%
             |             
            
                100.00
             |           
            
                100.00
             |               
            
                96.00
             |                           
            
                96.00
             | 
            
                96.00
             |                     
            
                30.46
             |                                 
            
                161,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2010
             | 
            
                0.00 / 0.00%
             |             
            
                103.00
             |           
            
                103.00
             |               
            
                99.50
             |                           
            
                100.00
             | 
            
                100.00
             |                     
            
                31.73
             |                                 
            
                277,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2010
             | 
            
                -2.00 / -1.96%
             |             
            
                104.00
             |           
            
                104.00
             |               
            
                99.50
             |                           
            
                100.00
             | 
            
                100.00
             |                     
            
                31.73
             |                                 
            
                245,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/25/2010
             | 
            
                +2.50 / +2.51%
             |             
            
                102.00
             |           
            
                104.00
             |               
            
                99.00
             |                           
            
                102.00
             | 
            
                102.00
             |                     
            
                32.37
             |                                 
            
                182,260
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2010
             | 
            
                +4.50 / +4.74%
             |             
            
                97.50
             |           
            
                99.50
             |               
            
                97.00
             |                           
            
                99.50
             | 
            
                99.50
             |                     
            
                31.57
             |                                 
            
                87,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2010
             | 
            
                +4.00 / +4.40%
             |             
            
                92.00
             |           
            
                95.00
             |               
            
                90.00
             |                           
            
                95.00
             | 
            
                95.00
             |                     
            
                30.15
             |                                 
            
                288,710
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2010
             | 
            
                -1.00 / -1.09%
             |             
            
                93.00
             |           
            
                93.00
             |               
            
                91.00
             |                           
            
                91.00
             | 
            
                91.00
             |                     
            
                28.88
             |                                 
            
                78,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2010
             | 
            
                0.00 / 0.00%
             |             
            
                91.50
             |           
            
                92.00
             |               
            
                90.00
             |                           
            
                92.00
             | 
            
                92.00
             |                     
            
                29.19
             |                                 
            
                95,320
             |            
            
                 
             |                                       
         
    
        
            | 
                6/18/2010
             | 
            
                0.00 / 0.00%
             |             
            
                92.00
             |           
            
                92.00
             |               
            
                92.00
             |                           
            
                92.00
             | 
            
                92.00
             |                     
            
                29.19
             |                                 
            
                55,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2010
             | 
            
                -0.50 / -0.54%
             |             
            
                94.50
             |           
            
                95.00
             |               
            
                92.00
             |                           
            
                92.00
             | 
            
                92.00
             |                     
            
                29.19
             |                                 
            
                102,860
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2010
             | 
            
                +0.50 / +0.54%
             |             
            
                93.00
             |           
            
                93.50
             |               
            
                91.50
             |                           
            
                92.50
             | 
            
                92.50
             |                     
            
                29.35
             |                                 
            
                92,750
             |  
            
                 
             |                                                              
             
    
         
    
    
 |