| 
    
        
            | 
                    Closing price on 3/20/2013
                 |  |  
    
        |           
                
                    | Open | 24.50 |  
                    | High | 26.20 |  
                    | Low | 24.00 |  
                    | Volume | 20,530 |  
                    | Split-adjusted Price | 10.38 |  
                
             | 
 |  BTT Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 3/20/2013 | 0.00 / 0.00% | 24.50 | 26.20 | 24.00 | 24.50 | 24.50 | 10.38 | 20,530 |   |  
            | 3/19/2013 | +0.70 / +2.94% | 23.80 | 24.50 | 23.80 | 24.50 | 24.50 | 10.38 | 2,150 |   |  			
            | 3/18/2013 | -0.20 / -0.83% | 23.80 | 23.80 | 23.20 | 23.80 | 23.80 | 10.09 | 1,600 |   |  
            | 3/15/2013 | +0.20 / +0.84% | 24.00 | 24.00 | 23.80 | 24.00 | 24.00 | 10.17 | 600 |   |  			
            | 3/14/2013 | +0.40 / +1.71% | 23.50 | 23.80 | 23.50 | 23.80 | 23.80 | 10.09 | 3,430 |   |  
            | 3/13/2013 | +0.10 / +0.43% | 23.30 | 23.60 | 23.30 | 23.40 | 23.40 | 9.92 | 4,020 |   |  			
            | 3/12/2013 | -0.30 / -1.27% | 23.00 | 23.50 | 23.00 | 23.30 | 23.30 | 9.87 | 2,760 |   |  
            | 3/11/2013 | +0.10 / +0.43% | 23.50 | 23.60 | 23.50 | 23.60 | 23.60 | 10.00 | 820 |   |  			
            | 3/8/2013 | +1.00 / +4.44% | 22.80 | 23.50 | 22.80 | 23.50 | 23.50 | 9.96 | 510 |   |  
            | 3/7/2013 | +0.20 / +0.90% | 23.50 | 23.50 | 22.50 | 22.50 | 22.50 | 9.54 | 1,910 |   |  			
            | 3/6/2013 | 0.00 / 0.00% | 23.50 | 23.50 | 22.30 | 22.30 | 22.30 | 9.45 | 1,220 |   |  
            | 3/5/2013 | -0.20 / -0.89% | 22.30 | 22.30 | 22.30 | 22.30 | 22.30 | 9.45 | 20 |   |  			
            | 3/4/2013 | -1.00 / -4.26% | 23.20 | 23.50 | 22.50 | 22.50 | 22.50 | 9.54 | 8,940 |   |  
            | 3/1/2013 | +0.50 / +2.17% | 23.00 | 23.50 | 23.00 | 23.50 | 23.50 | 9.96 | 4,030 |   |  			
            | 2/28/2013 | +0.10 / +0.44% | 23.00 | 23.00 | 23.00 | 23.00 | 23.00 | 9.75 | 50 |   |  
            | 2/27/2013 | 0.00 / 0.00% | 22.90 | 23.00 | 22.90 | 22.90 | 22.90 | 9.71 | 2,300 |   |  			
            | 2/26/2013 | +0.20 / +0.88% | 23.00 | 23.50 | 22.90 | 22.90 | 22.90 | 9.71 | 8,200 |   |  
            | 2/25/2013 | +0.20 / +0.89% | 22.70 | 22.70 | 22.70 | 22.70 | 22.70 | 9.62 | 220 |   |  			
            | 2/22/2013 | -0.80 / -3.43% | 23.00 | 23.10 | 22.50 | 22.50 | 22.50 | 9.54 | 810 |   |  
            | 2/21/2013 | +1.50 / +6.88% | 23.30 | 23.30 | 23.30 | 23.30 | 23.30 | 9.87 | 2,140 |   |  			
            | 2/20/2013 | 0.00 / 0.00% | 21.80 | 21.80 | 21.80 | 21.80 | 21.80 | 9.24 | 0 |   |  
            | 2/19/2013 | 0.00 / 0.00% | 21.80 | 21.80 | 21.80 | 21.80 | 21.80 | 9.24 | 0 |   |  			
            | 2/18/2013 | -1.50 / -6.44% | 21.80 | 21.80 | 21.80 | 21.80 | 21.80 | 9.24 | 10 |   |  
            | 2/8/2013 | +0.10 / +0.43% | 23.30 | 23.30 | 23.30 | 23.30 | 23.30 | 9.87 | 1,200 |   |  			
            | 2/7/2013 | +1.50 / +6.91% | 22.30 | 23.20 | 21.70 | 23.20 | 23.20 | 9.83 | 22,190 |   |  
            | 2/6/2013 | 0.00 / 0.00% | 22.00 | 22.00 | 21.70 | 21.70 | 21.70 | 9.20 | 210 |   |  			
            | 2/5/2013 | 0.00 / 0.00% | 21.70 | 21.70 | 21.70 | 21.70 | 21.70 | 9.20 | 280 |   |  
            | 2/4/2013 | 0.00 / 0.00% | 21.70 | 22.00 | 21.70 | 21.70 | 21.70 | 9.20 | 4,750 |   |  			
            | 2/1/2013 | +0.20 / +0.93% | 21.70 | 21.70 | 21.60 | 21.70 | 21.70 | 9.20 | 1,620 |   |  
            | 1/31/2013 | +0.20 / +0.94% | 22.00 | 22.00 | 21.50 | 21.50 | 21.50 | 9.11 | 120 |   |  |