| 
                 
                    Closing price on 9/7/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    19.50 | 
                 
                
                    | High | 
                    19.90 | 
                 
                
                    | Low | 
                    19.40 | 
                     
                
                    | Volume | 
                    285,850 | 
                                 
                
                    | Split-adjusted Price | 
                    3.87 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DIG Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/7/2011
             | 
            
                +0.90 / +4.74%
             |             
            
                19.50
             |           
            
                19.90
             |               
            
                19.40
             |                           
            
                19.90
             | 
            
                19.90
             |                     
            
                3.87
             |                                 
            
                285,850
             |            
            
                 
             |                                       
         
    
        
            | 
                9/6/2011
             | 
            
                -0.20 / -1.04%
             |             
            
                18.80
             |           
            
                19.00
             |               
            
                18.50
             |                           
            
                19.00
             | 
            
                19.00
             |                     
            
                3.70
             |                                 
            
                189,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/5/2011
             | 
            
                -0.50 / -2.54%
             |             
            
                19.60
             |           
            
                19.80
             |               
            
                19.00
             |                           
            
                19.20
             | 
            
                19.20
             |                     
            
                3.74
             |                                 
            
                302,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/1/2011
             | 
            
                +0.60 / +3.14%
             |             
            
                19.00
             |           
            
                20.00
             |               
            
                19.00
             |                           
            
                19.70
             | 
            
                19.70
             |                     
            
                3.83
             |                                 
            
                413,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/31/2011
             | 
            
                -0.20 / -1.04%
             |             
            
                19.10
             |           
            
                19.40
             |               
            
                18.60
             |                           
            
                19.10
             | 
            
                19.10
             |                     
            
                3.72
             |                                 
            
                304,050
             |            
            
                 
             |                                       
         
    
        
            | 
                8/30/2011
             | 
            
                +0.40 / +2.12%
             |             
            
                19.70
             |           
            
                19.80
             |               
            
                19.10
             |                           
            
                19.30
             | 
            
                19.30
             |                     
            
                3.75
             |                                 
            
                210,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/29/2011
             | 
            
                +0.90 / +5.00%
             |             
            
                18.00
             |           
            
                18.90
             |               
            
                17.90
             |                           
            
                18.90
             | 
            
                18.90
             |                     
            
                3.68
             |                                 
            
                251,550
             |            
            
                 
             |                                       
         
    
        
            | 
                8/26/2011
             | 
            
                +0.20 / +1.12%
             |             
            
                17.70
             |           
            
                18.60
             |               
            
                17.70
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                3.50
             |                                 
            
                389,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/25/2011
             | 
            
                +0.80 / +4.71%
             |             
            
                16.90
             |           
            
                17.80
             |               
            
                16.90
             |                           
            
                17.80
             | 
            
                17.80
             |                     
            
                3.46
             |                                 
            
                292,740
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2011
             | 
            
                -0.20 / -1.16%
             |             
            
                17.30
             |           
            
                17.50
             |               
            
                16.90
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                3.31
             |                                 
            
                258,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2011
             | 
            
                +0.60 / +3.61%
             |             
            
                16.60
             |           
            
                17.40
             |               
            
                16.50
             |                           
            
                17.20
             | 
            
                17.20
             |                     
            
                3.35
             |                                 
            
                206,670
             |            
            
                 
             |                                       
         
    
        
            | 
                8/22/2011
             | 
            
                +0.70 / +4.40%
             |             
            
                16.50
             |           
            
                16.60
             |               
            
                16.30
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                3.23
             |                                 
            
                120,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2011
             | 
            
                -0.60 / -3.64%
             |             
            
                16.00
             |           
            
                16.40
             |               
            
                15.90
             |                           
            
                15.90
             | 
            
                15.90
             |                     
            
                3.09
             |                                 
            
                139,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/18/2011
             | 
            
                +0.60 / +3.77%
             |             
            
                16.30
             |           
            
                16.60
             |               
            
                16.30
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                3.21
             |                                 
            
                223,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2011
             | 
            
                +0.70 / +4.61%
             |             
            
                15.40
             |           
            
                15.90
             |               
            
                15.40
             |                           
            
                15.90
             | 
            
                15.90
             |                     
            
                3.09
             |                                 
            
                188,530
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2011
             | 
            
                +0.20 / +1.33%
             |             
            
                15.00
             |           
            
                15.30
             |               
            
                15.00
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                2.96
             |                                 
            
                142,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/15/2011
             | 
            
                -0.10 / -0.66%
             |             
            
                15.10
             |           
            
                15.10
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                2.92
             |                                 
            
                48,060
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2011
             | 
            
                -0.10 / -0.66%
             |             
            
                15.60
             |           
            
                15.60
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                2.94
             |                                 
            
                57,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.20
             |               
            
                14.80
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                2.96
             |                                 
            
                36,510
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2011
             | 
            
                +0.10 / +0.66%
             |             
            
                15.10
             |           
            
                15.50
             |               
            
                15.10
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                2.96
             |                                 
            
                415,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2011
             | 
            
                -0.70 / -4.43%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                2.94
             |                                 
            
                173,770
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2011
             | 
            
                +0.40 / +2.60%
             |             
            
                15.80
             |           
            
                16.10
             |               
            
                15.60
             |                           
            
                15.80
             | 
            
                15.80
             |                     
            
                3.07
             |                                 
            
                190,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2011
             | 
            
                -0.60 / -3.75%
             |             
            
                15.30
             |           
            
                16.00
             |               
            
                15.30
             |                           
            
                15.40
             | 
            
                15.40
             |                     
            
                3.00
             |                                 
            
                48,840
             |            
            
                 
             |                                       
         
    
        
            | 
                8/4/2011
             | 
            
                +0.70 / +4.58%
             |             
            
                15.30
             |           
            
                16.00
             |               
            
                15.30
             |                           
            
                16.00
             | 
            
                16.00
             |                     
            
                3.11
             |                                 
            
                162,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2011
             | 
            
                -0.40 / -2.55%
             |             
            
                15.70
             |           
            
                15.70
             |               
            
                15.20
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                2.98
             |                                 
            
                45,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2011
             | 
            
                -0.60 / -3.68%
             |             
            
                16.10
             |           
            
                16.20
             |               
            
                15.60
             |                           
            
                15.70
             | 
            
                15.70
             |                     
            
                3.05
             |                                 
            
                23,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2011
             | 
            
                -0.20 / -1.21%
             |             
            
                16.10
             |           
            
                16.30
             |               
            
                15.70
             |                           
            
                16.30
             | 
            
                16.30
             |                     
            
                3.17
             |                                 
            
                150,280
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2011
             | 
            
                -0.20 / -1.20%
             |             
            
                16.50
             |           
            
                16.60
             |               
            
                16.30
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                3.21
             |                                 
            
                90,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/28/2011
             | 
            
                -0.10 / -0.60%
             |             
            
                16.80
             |           
            
                17.00
             |               
            
                16.70
             |                           
            
                16.70
             | 
            
                16.70
             |                     
            
                3.25
             |                                 
            
                117,720
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2011
             | 
            
                0.00 / 0.00%
             |             
            
                17.10
             |           
            
                17.10
             |               
            
                16.80
             |                           
            
                16.80
             | 
            
                16.80
             |                     
            
                3.27
             |                                 
            
                75,250
             |  
            
                 
             |                                                              
             
    
         
    
    
 |