| 
                 
                    Closing price on 8/23/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.40 | 
                 
                
                    | High | 
                    11.60 | 
                 
                
                    | Low | 
                    11.40 | 
                     
                
                    | Volume | 
                    18,880 | 
                                 
                
                    | Split-adjusted Price | 
                    7.18 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DTT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/23/2010
             | 
            
                0.00 / 0.00%
             |             
            
                11.40
             |           
            
                11.60
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                7.18
             |                                 
            
                18,880
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2010
             | 
            
                -0.20 / -1.72%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.20
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                7.18
             |                                 
            
                55,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2010
             | 
            
                +0.10 / +0.87%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.50
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                7.30
             |                                 
            
                34,260
             |            
            
                 
             |                                       
         
    
        
            | 
                8/18/2010
             | 
            
                -0.50 / -4.17%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.24
             |                                 
            
                23,830
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2010
             | 
            
                +0.20 / +1.69%
             |             
            
                11.80
             |           
            
                12.10
             |               
            
                11.60
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                7.55
             |                                 
            
                55,510
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2010
             | 
            
                +0.50 / +4.42%
             |             
            
                11.50
             |           
            
                11.80
             |               
            
                11.50
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.43
             |                                 
            
                42,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2010
             | 
            
                0.00 / 0.00%
             |             
            
                11.10
             |           
            
                11.60
             |               
            
                11.10
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                7.11
             |                                 
            
                89,930
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2010
             | 
            
                -0.50 / -4.24%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.30
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                7.11
             |                                 
            
                134,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/11/2010
             | 
            
                -0.40 / -3.28%
             |             
            
                12.00
             |           
            
                12.40
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.43
             |                                 
            
                62,120
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2010
             | 
            
                -0.60 / -4.69%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.20
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                7.68
             |                                 
            
                43,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2010
             | 
            
                -0.60 / -4.48%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                8.06
             |                                 
            
                66,710
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2010
             | 
            
                -0.10 / -0.74%
             |             
            
                13.20
             |           
            
                13.40
             |               
            
                12.90
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                8.43
             |                                 
            
                106,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2010
             | 
            
                -0.10 / -0.74%
             |             
            
                13.70
             |           
            
                13.70
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                8.50
             |                                 
            
                65,850
             |            
            
                 
             |                                       
         
    
        
            | 
                8/4/2010
             | 
            
                -0.40 / -2.86%
             |             
            
                13.60
             |           
            
                13.60
             |               
            
                13.50
             |                           
            
                13.60
             | 
            
                13.60
             |                     
            
                8.56
             |                                 
            
                28,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2010
             | 
            
                -0.30 / -2.10%
             |             
            
                14.30
             |           
            
                14.30
             |               
            
                13.90
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                8.81
             |                                 
            
                30,030
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2010
             | 
            
                +0.40 / +2.88%
             |             
            
                14.30
             |           
            
                14.40
             |               
            
                14.00
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                9.00
             |                                 
            
                28,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2010
             | 
            
                +0.50 / +3.73%
             |             
            
                13.40
             |           
            
                14.00
             |               
            
                13.40
             |                           
            
                13.90
             | 
            
                13.90
             |                     
            
                8.75
             |                                 
            
                67,970
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2010
             | 
            
                -0.10 / -0.74%
             |             
            
                13.30
             |           
            
                13.90
             |               
            
                13.10
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                8.43
             |                                 
            
                32,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/28/2010
             | 
            
                -0.20 / -1.46%
             |             
            
                13.90
             |           
            
                13.90
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                8.50
             |                                 
            
                31,650
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2010
             | 
            
                -0.50 / -3.52%
             |             
            
                14.10
             |           
            
                14.20
             |               
            
                13.70
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                8.62
             |                                 
            
                64,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2010
             | 
            
                -0.40 / -2.74%
             |             
            
                14.50
             |           
            
                14.80
             |               
            
                14.20
             |                           
            
                14.20
             | 
            
                14.20
             |                     
            
                8.94
             |                                 
            
                37,630
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2010
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                14.60
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                9.19
             |                                 
            
                23,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/22/2010
             | 
            
                -0.40 / -2.67%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                14.50
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                9.19
             |                                 
            
                42,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/21/2010
             | 
            
                -0.20 / -1.32%
             |             
            
                15.40
             |           
            
                15.40
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                9.44
             |                                 
            
                52,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/20/2010
             | 
            
                +0.10 / +0.66%
             |             
            
                15.40
             |           
            
                15.40
             |               
            
                15.00
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                9.57
             |                                 
            
                120,870
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2010
             | 
            
                -0.40 / -2.58%
             |             
            
                15.10
             |           
            
                15.70
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                9.50
             |                                 
            
                101,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/16/2010
             | 
            
                +0.70 / +4.73%
             |             
            
                14.80
             |           
            
                15.50
             |               
            
                14.70
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                9.76
             |                                 
            
                183,980
             |            
            
                 
             |                                       
         
    
        
            | 
                7/15/2010
             | 
            
                0.00 / 0.00%
             |             
            
                14.80
             |           
            
                14.90
             |               
            
                14.70
             |                           
            
                14.80
             | 
            
                14.80
             |                     
            
                9.31
             |                                 
            
                36,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/14/2010
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                14.70
             |                           
            
                14.80
             | 
            
                14.80
             |                     
            
                9.31
             |                                 
            
                93,670
             |            
            
                 
             |                                       
         
    
        
            | 
                7/13/2010
             | 
            
                -0.20 / -1.33%
             |             
            
                15.00
             |           
            
                15.50
             |               
            
                14.80
             |                           
            
                14.80
             | 
            
                14.80
             |                     
            
                9.31
             |                                 
            
                74,270
             |  
            
                 
             |                                                              
             
    
         
    
    
 |