| 
                 
                    Closing price on 1/4/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    68.00 | 
                 
                
                    | High | 
                    69.50 | 
                 
                
                    | Low | 
                    68.00 | 
                     
                
                    | Volume | 
                    510 | 
                                 
                
                    | Split-adjusted Price | 
                    18.81 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
BT6 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                1/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                68.00
             |           
            
                69.50
             |               
            
                68.00
             |                           
            
                69.50
             | 
            
                69.50
             |                     
            
                18.81
             |                                 
            
                510
             |            
            
                 
             |                                       
         
    
        
            | 
                12/31/2010
             | 
            
                -1.00 / -1.42%
             |             
            
                67.00
             |           
            
                69.50
             |               
            
                67.00
             |                           
            
                69.50
             | 
            
                69.50
             |                     
            
                18.81
             |                                 
            
                2,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/30/2010
             | 
            
                0.00 / 0.00%
             |             
            
                70.50
             |           
            
                70.50
             |               
            
                70.50
             |                           
            
                70.50
             | 
            
                70.50
             |                     
            
                19.09
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                12/29/2010
             | 
            
                0.00 / 0.00%
             |             
            
                70.50
             |           
            
                70.50
             |               
            
                70.50
             |                           
            
                70.50
             | 
            
                70.50
             |                     
            
                19.09
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/28/2010
             | 
            
                0.00 / 0.00%
             |             
            
                70.00
             |           
            
                70.50
             |               
            
                70.00
             |                           
            
                70.50
             | 
            
                70.50
             |                     
            
                19.09
             |                                 
            
                1,010
             |            
            
                 
             |                                       
         
    
        
            | 
                12/27/2010
             | 
            
                -0.50 / -0.70%
             |             
            
                70.50
             |           
            
                70.50
             |               
            
                70.50
             |                           
            
                70.50
             | 
            
                70.50
             |                     
            
                19.09
             |                                 
            
                1,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/24/2010
             | 
            
                0.00 / 0.00%
             |             
            
                70.00
             |           
            
                71.00
             |               
            
                70.00
             |                           
            
                71.00
             | 
            
                71.00
             |                     
            
                19.22
             |                                 
            
                2,500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/23/2010
             | 
            
                +1.50 / +2.16%
             |             
            
                71.00
             |           
            
                71.00
             |               
            
                71.00
             |                           
            
                71.00
             | 
            
                71.00
             |                     
            
                19.22
             |                                 
            
                2,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/22/2010
             | 
            
                -0.50 / -0.71%
             |             
            
                69.50
             |           
            
                69.50
             |               
            
                69.50
             |                           
            
                69.50
             | 
            
                69.50
             |                     
            
                18.81
             |                                 
            
                7,000
             |            
            
                 
             |                                       
         
    
        
            | 
                12/21/2010
             | 
            
                0.00 / 0.00%
             |             
            
                67.50
             |           
            
                70.00
             |               
            
                67.50
             |                           
            
                70.00
             | 
            
                70.00
             |                     
            
                18.95
             |                                 
            
                3,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/20/2010
             | 
            
                -1.00 / -1.41%
             |             
            
                67.50
             |           
            
                70.00
             |               
            
                67.50
             |                           
            
                70.00
             | 
            
                70.00
             |                     
            
                18.95
             |                                 
            
                1,020
             |            
            
                 
             |                                       
         
    
        
            | 
                12/17/2010
             | 
            
                +3.00 / +4.41%
             |             
            
                66.00
             |           
            
                71.00
             |               
            
                66.00
             |                           
            
                71.00
             | 
            
                71.00
             |                     
            
                19.22
             |                                 
            
                570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/16/2010
             | 
            
                -3.50 / -4.90%
             |             
            
                68.00
             |           
            
                68.50
             |               
            
                68.00
             |                           
            
                68.00
             | 
            
                68.00
             |                     
            
                18.41
             |                                 
            
                10,730
             |            
            
                 
             |                                       
         
    
        
            | 
                12/15/2010
             | 
            
                +2.50 / +3.62%
             |             
            
                67.50
             |           
            
                71.50
             |               
            
                67.50
             |                           
            
                71.50
             | 
            
                71.50
             |                     
            
                19.36
             |                                 
            
                960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/14/2010
             | 
            
                -3.50 / -4.83%
             |             
            
                70.50
             |           
            
                70.50
             |               
            
                69.00
             |                           
            
                69.00
             | 
            
                69.00
             |                     
            
                18.68
             |                                 
            
                1,450
             |            
            
                 
             |                                       
         
    
        
            | 
                12/13/2010
             | 
            
                0.00 / 0.00%
             |             
            
                73.00
             |           
            
                73.00
             |               
            
                70.00
             |                           
            
                72.50
             | 
            
                72.50
             |                     
            
                19.63
             |                                 
            
                6,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/10/2010
             | 
            
                +0.50 / +0.69%
             |             
            
                73.00
             |           
            
                73.00
             |               
            
                68.50
             |                           
            
                72.50
             | 
            
                72.50
             |                     
            
                19.63
             |                                 
            
                2,190
             |            
            
                 
             |                                       
         
    
        
            | 
                12/9/2010
             | 
            
                0.00 / 0.00%
             |             
            
                72.00
             |           
            
                72.00
             |               
            
                72.00
             |                           
            
                72.00
             | 
            
                72.00
             |                     
            
                19.49
             |                                 
            
                1,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/8/2010
             | 
            
                +0.50 / +0.70%
             |             
            
                68.50
             |           
            
                72.00
             |               
            
                68.00
             |                           
            
                72.00
             | 
            
                72.00
             |                     
            
                19.49
             |                                 
            
                1,050
             |            
            
                 
             |                                       
         
    
        
            | 
                12/7/2010
             | 
            
                +0.50 / +0.70%
             |             
            
                67.50
             |           
            
                71.50
             |               
            
                67.50
             |                           
            
                71.50
             | 
            
                71.50
             |                     
            
                19.36
             |                                 
            
                130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/6/2010
             | 
            
                -0.50 / -0.70%
             |             
            
                71.00
             |           
            
                71.00
             |               
            
                71.00
             |                           
            
                71.00
             | 
            
                71.00
             |                     
            
                19.22
             |                                 
            
                510
             |            
            
                 
             |                                       
         
    
        
            | 
                12/3/2010
             | 
            
                0.00 / 0.00%
             |             
            
                71.50
             |           
            
                71.50
             |               
            
                70.00
             |                           
            
                71.50
             | 
            
                71.50
             |                     
            
                19.36
             |                                 
            
                2,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/2/2010
             | 
            
                0.00 / 0.00%
             |             
            
                71.00
             |           
            
                71.50
             |               
            
                71.00
             |                           
            
                71.50
             | 
            
                71.50
             |                     
            
                19.36
             |                                 
            
                2,020
             |            
            
                 
             |                                       
         
    
        
            | 
                12/1/2010
             | 
            
                +0.50 / +0.70%
             |             
            
                71.50
             |           
            
                71.50
             |               
            
                71.50
             |                           
            
                71.50
             | 
            
                71.50
             |                     
            
                19.36
             |                                 
            
                10
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/30/2010
             | 
            
                +1.50 / +2.16%
             |             
            
                69.50
             |           
            
                71.00
             |               
            
                68.50
             |                           
            
                71.00
             | 
            
                71.00
             |                     
            
                19.22
             |                                 
            
                1,610
             |            
            
                 
             |                                       
         
    
        
            | 
                11/29/2010
             | 
            
                +1.00 / +1.46%
             |             
            
                68.50
             |           
            
                70.50
             |               
            
                68.50
             |                           
            
                69.50
             | 
            
                69.50
             |                     
            
                18.81
             |                                 
            
                2,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/26/2010
             | 
            
                -3.50 / -4.86%
             |             
            
                68.50
             |           
            
                68.50
             |               
            
                68.50
             |                           
            
                68.50
             | 
            
                68.50
             |                     
            
                18.54
             |                                 
            
                10
             |            
            
                 
             |                                       
         
    
        
            | 
                11/25/2010
             | 
            
                +0.50 / +0.70%
             |             
            
                72.00
             |           
            
                72.00
             |               
            
                72.00
             |                           
            
                72.00
             | 
            
                72.00
             |                     
            
                19.49
             |                                 
            
                1,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/24/2010
             | 
            
                0.00 / 0.00%
             |             
            
                71.50
             |           
            
                71.50
             |               
            
                71.50
             |                           
            
                71.50
             | 
            
                71.50
             |                     
            
                19.36
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/23/2010
             | 
            
                0.00 / 0.00%
             |             
            
                68.00
             |           
            
                71.50
             |               
            
                68.00
             |                           
            
                71.50
             | 
            
                71.50
             |                     
            
                19.36
             |                                 
            
                2,200
             |  
            
                 
             |                                                              
             
    
         
    
    
 |