| 
                 
                    Closing price on 8/27/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    21.20 | 
                 
                
                    | High | 
                    21.20 | 
                 
                
                    | Low | 
                    20.30 | 
                     
                
                    | Volume | 
                    6,020 | 
                                 
                
                    | Split-adjusted Price | 
                    6.96 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
BTT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/27/2012
             | 
            
                +0.30 / +1.49%
             |             
            
                21.20
             |           
            
                21.20
             |               
            
                20.30
             |                           
            
                20.50
             | 
            
                20.50
             |                     
            
                6.96
             |                                 
            
                6,020
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2012
             | 
            
                +0.90 / +4.66%
             |             
            
                20.20
             |           
            
                20.20
             |               
            
                20.20
             |                           
            
                20.20
             | 
            
                20.20
             |                     
            
                6.86
             |                                 
            
                3,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2012
             | 
            
                -0.80 / -3.98%
             |             
            
                21.10
             |           
            
                21.10
             |               
            
                19.30
             |                           
            
                19.30
             | 
            
                19.30
             |                     
            
                6.55
             |                                 
            
                2,120
             |            
            
                 
             |                                       
         
    
        
            | 
                8/22/2012
             | 
            
                -0.80 / -3.83%
             |             
            
                20.10
             |           
            
                21.90
             |               
            
                20.10
             |                           
            
                20.10
             | 
            
                20.10
             |                     
            
                6.82
             |                                 
            
                3,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/21/2012
             | 
            
                -1.00 / -4.57%
             |             
            
                22.80
             |           
            
                22.80
             |               
            
                20.90
             |                           
            
                20.90
             | 
            
                20.90
             |                     
            
                7.10
             |                                 
            
                110
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2012
             | 
            
                +1.00 / +4.78%
             |             
            
                21.90
             |           
            
                21.90
             |               
            
                21.90
             |                           
            
                21.90
             | 
            
                21.90
             |                     
            
                7.43
             |                                 
            
                1,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2012
             | 
            
                -0.60 / -2.79%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                20.70
             |                           
            
                20.90
             | 
            
                20.90
             |                     
            
                7.10
             |                                 
            
                530
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2012
             | 
            
                -0.40 / -1.83%
             |             
            
                22.90
             |           
            
                22.90
             |               
            
                21.50
             |                           
            
                21.50
             | 
            
                21.50
             |                     
            
                7.30
             |                                 
            
                130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/15/2012
             | 
            
                -0.90 / -3.95%
             |             
            
                23.30
             |           
            
                23.30
             |               
            
                21.90
             |                           
            
                21.90
             | 
            
                21.90
             |                     
            
                7.43
             |                                 
            
                110
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2012
             | 
            
                -0.50 / -2.15%
             |             
            
                22.20
             |           
            
                23.00
             |               
            
                22.20
             |                           
            
                22.80
             | 
            
                22.80
             |                     
            
                7.74
             |                                 
            
                470
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2012
             | 
            
                +1.10 / +4.95%
             |             
            
                23.30
             |           
            
                23.30
             |               
            
                23.30
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                7.91
             |                                 
            
                60
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2012
             | 
            
                -1.10 / -4.72%
             |             
            
                24.30
             |           
            
                24.40
             |               
            
                22.20
             |                           
            
                22.20
             | 
            
                22.20
             |                     
            
                7.54
             |                                 
            
                4,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2012
             | 
            
                +1.10 / +4.95%
             |             
            
                23.30
             |           
            
                23.30
             |               
            
                21.20
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                7.91
             |                                 
            
                3,760
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2012
             | 
            
                -0.30 / -1.33%
             |             
            
                23.50
             |           
            
                23.50
             |               
            
                22.00
             |                           
            
                22.20
             | 
            
                22.20
             |                     
            
                7.54
             |                                 
            
                4,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2012
             | 
            
                -1.10 / -4.66%
             |             
            
                22.50
             |           
            
                22.90
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                7.64
             |                                 
            
                1,260
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2012
             | 
            
                +1.10 / +4.89%
             |             
            
                22.80
             |           
            
                23.60
             |               
            
                22.80
             |                           
            
                23.60
             | 
            
                23.60
             |                     
            
                8.01
             |                                 
            
                80
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2012
             | 
            
                -1.10 / -4.66%
             |             
            
                24.40
             |           
            
                24.40
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                7.64
             |                                 
            
                230
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2012
             | 
            
                +0.80 / +3.51%
             |             
            
                23.90
             |           
            
                23.90
             |               
            
                21.70
             |                           
            
                23.60
             | 
            
                23.60
             |                     
            
                8.01
             |                                 
            
                30
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2012
             | 
            
                +0.70 / +3.17%
             |             
            
                22.80
             |           
            
                22.80
             |               
            
                22.10
             |                           
            
                22.80
             | 
            
                22.80
             |                     
            
                7.74
             |                                 
            
                70
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2012
             | 
            
                +1.00 / +4.74%
             |             
            
                22.10
             |           
            
                22.10
             |               
            
                20.50
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                7.50
             |                                 
            
                30
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2012
             | 
            
                -0.50 / -2.31%
             |             
            
                22.60
             |           
            
                22.60
             |               
            
                20.80
             |                           
            
                21.10
             | 
            
                21.10
             |                     
            
                7.16
             |                                 
            
                1,020
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2012
             | 
            
                -1.10 / -4.85%
             |             
            
                23.80
             |           
            
                23.80
             |               
            
                21.60
             |                           
            
                21.60
             | 
            
                21.60
             |                     
            
                7.33
             |                                 
            
                650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2012
             | 
            
                -1.10 / -4.62%
             |             
            
                22.70
             |           
            
                23.70
             |               
            
                22.70
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                7.71
             |                                 
            
                4,110
             |            
            
                 
             |                                       
         
    
        
            | 
                7/25/2012
             | 
            
                -0.10 / -0.42%
             |             
            
                25.00
             |           
            
                25.00
             |               
            
                22.80
             |                           
            
                23.80
             | 
            
                23.80
             |                     
            
                8.08
             |                                 
            
                3,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/24/2012
             | 
            
                +0.90 / +3.91%
             |             
            
                23.90
             |           
            
                23.90
             |               
            
                23.90
             |                           
            
                23.90
             | 
            
                23.90
             |                     
            
                8.11
             |                                 
            
                10
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2012
             | 
            
                -0.10 / -0.43%
             |             
            
                22.10
             |           
            
                23.00
             |               
            
                22.00
             |                           
            
                23.00
             | 
            
                23.00
             |                     
            
                7.81
             |                                 
            
                10,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/20/2012
             | 
            
                +1.00 / +4.52%
             |             
            
                22.90
             |           
            
                23.10
             |               
            
                22.90
             |                           
            
                23.10
             | 
            
                23.10
             |                     
            
                7.50
             |                                 
            
                3,010
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2012
             | 
            
                +0.10 / +0.45%
             |             
            
                22.00
             |           
            
                22.80
             |               
            
                22.00
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                7.18
             |                                 
            
                960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/18/2012
             | 
            
                -0.10 / -0.45%
             |             
            
                22.10
             |           
            
                22.40
             |               
            
                22.00
             |                           
            
                22.00
             | 
            
                22.00
             |                     
            
                7.15
             |                                 
            
                3,180
             |            
            
                 
             |                                       
         
    
        
            | 
                7/17/2012
             | 
            
                +0.10 / +0.45%
             |             
            
                22.00
             |           
            
                22.30
             |               
            
                22.00
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                7.18
             |                                 
            
                1,210
             |  
            
                 
             |                                                              
             
    
         
    
    
 |