| 
                 
                    Closing price on 6/21/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    6.30 | 
                 
                
                    | High | 
                    6.60 | 
                 
                
                    | Low | 
                    6.30 | 
                     
                
                    | Volume | 
                    24,070 | 
                                 
                
                    | Split-adjusted Price | 
                    4.26 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DTT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.30
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.60
             | 
            
                6.60
             |                     
            
                4.26
             |                                 
            
                24,070
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2011
             | 
            
                -0.30 / -4.35%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.60
             |                     
            
                4.26
             |                                 
            
                960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                4.45
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2011
             | 
            
                +0.20 / +2.99%
             |             
            
                6.40
             |           
            
                6.90
             |               
            
                6.40
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                4.45
             |                                 
            
                3,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2011
             | 
            
                -0.20 / -2.90%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                6.70
             |                           
            
                6.70
             | 
            
                6.70
             |                     
            
                4.32
             |                                 
            
                13,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2011
             | 
            
                +0.30 / +4.55%
             |             
            
                6.80
             |           
            
                6.90
             |               
            
                6.80
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                4.45
             |                                 
            
                2,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2011
             | 
            
                +0.30 / +4.76%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.60
             |                     
            
                4.26
             |                                 
            
                4,870
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.50
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                4.06
             |                                 
            
                12,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2011
             | 
            
                -0.20 / -3.08%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                4.06
             |                                 
            
                9,010
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2011
             | 
            
                -0.30 / -4.41%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                4.19
             |                                 
            
                12,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2011
             | 
            
                +0.10 / +1.49%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.80
             |                           
            
                6.80
             | 
            
                6.80
             |                     
            
                4.39
             |                                 
            
                1,220
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.70
             |               
            
                6.40
             |                           
            
                6.70
             | 
            
                6.70
             |                     
            
                4.32
             |                                 
            
                12,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2011
             | 
            
                -0.30 / -4.29%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.70
             |                           
            
                6.70
             | 
            
                6.70
             |                     
            
                4.32
             |                                 
            
                84,710
             |            
            
                 
             |                                       
         
    
        
            | 
                6/2/2011
             | 
            
                +0.20 / +2.94%
             |             
            
                6.70
             |           
            
                7.00
             |               
            
                6.70
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                4.51
             |                                 
            
                8,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/1/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.80
             |           
            
                6.80
             |               
            
                6.80
             |                           
            
                6.80
             | 
            
                6.80
             |                     
            
                4.39
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/31/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.70
             |           
            
                6.80
             |               
            
                6.60
             |                           
            
                6.80
             | 
            
                6.80
             |                     
            
                4.39
             |                                 
            
                6,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/30/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.60
             |           
            
                6.80
             |               
            
                6.60
             |                           
            
                6.80
             | 
            
                6.80
             |                     
            
                4.39
             |                                 
            
                4,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/27/2011
             | 
            
                -0.10 / -1.45%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.60
             |                           
            
                6.80
             | 
            
                6.80
             |                     
            
                4.39
             |                                 
            
                9,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/26/2011
             | 
            
                -0.30 / -4.17%
             |             
            
                6.90
             |           
            
                7.00
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                4.45
             |                                 
            
                11,120
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2011
             | 
            
                -0.30 / -4.00%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.20
             |                     
            
                4.64
             |                                 
            
                1,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2011
             | 
            
                -0.30 / -3.85%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.50
             |                     
            
                4.84
             |                                 
            
                9,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2011
             | 
            
                0.00 / 0.00%
             |             
            
                7.50
             |           
            
                7.80
             |               
            
                7.50
             |                           
            
                7.80
             | 
            
                7.80
             |                     
            
                5.03
             |                                 
            
                4,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2011
             | 
            
                +0.10 / +1.30%
             |             
            
                7.40
             |           
            
                7.80
             |               
            
                7.40
             |                           
            
                7.80
             | 
            
                7.80
             |                     
            
                5.03
             |                                 
            
                3,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                7.40
             |           
            
                7.70
             |               
            
                7.40
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.97
             |                                 
            
                6,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                7.40
             |           
            
                7.70
             |               
            
                7.40
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.97
             |                                 
            
                7,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2011
             | 
            
                -0.40 / -4.94%
             |             
            
                8.10
             |           
            
                8.10
             |               
            
                7.70
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.97
             |                                 
            
                20
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2011
             | 
            
                0.00 / 0.00%
             |             
            
                8.10
             |           
            
                8.10
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                5.22
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2011
             | 
            
                -0.30 / -3.57%
             |             
            
                8.40
             |           
            
                8.40
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                5.22
             |                                 
            
                1,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/12/2011
             | 
            
                -0.20 / -2.33%
             |             
            
                8.20
             |           
            
                8.40
             |               
            
                8.20
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                5.42
             |                                 
            
                7,810
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2011
             | 
            
                -0.10 / -1.15%
             |             
            
                8.30
             |           
            
                8.60
             |               
            
                8.30
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                5.55
             |                                 
            
                3,520
             |  
            
                 
             |                                                              
             
    
         
    
    
 |