| 
                 
                    Closing price on 1/21/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    37.60 | 
                 
                
                    | High | 
                    38.80 | 
                 
                
                    | Low | 
                    37.60 | 
                     
                
                    | Volume | 
                    298,080 | 
                                 
                
                    | Split-adjusted Price | 
                    7.53 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DIG Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                1/21/2011
             | 
            
                +0.70 / +1.84%
             |             
            
                37.60
             |           
            
                38.80
             |               
            
                37.60
             |                           
            
                38.70
             | 
            
                38.70
             |                     
            
                7.53
             |                                 
            
                298,080
             |            
            
                 
             |                                       
         
    
        
            | 
                1/20/2011
             | 
            
                -0.40 / -1.04%
             |             
            
                38.40
             |           
            
                38.40
             |               
            
                38.00
             |                           
            
                38.00
             | 
            
                38.00
             |                     
            
                7.39
             |                                 
            
                79,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                39.20
             |           
            
                39.80
             |               
            
                38.20
             |                           
            
                38.40
             | 
            
                38.40
             |                     
            
                7.47
             |                                 
            
                153,870
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2011
             | 
            
                -1.40 / -3.52%
             |             
            
                39.80
             |           
            
                39.90
             |               
            
                38.40
             |                           
            
                38.40
             | 
            
                38.40
             |                     
            
                7.47
             |                                 
            
                79,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/17/2011
             | 
            
                +0.30 / +0.76%
             |             
            
                39.50
             |           
            
                40.10
             |               
            
                39.50
             |                           
            
                39.80
             | 
            
                39.80
             |                     
            
                7.74
             |                                 
            
                88,990
             |            
            
                 
             |                                       
         
    
        
            | 
                1/14/2011
             | 
            
                +0.60 / +1.54%
             |             
            
                38.90
             |           
            
                39.50
             |               
            
                38.70
             |                           
            
                39.50
             | 
            
                39.50
             |                     
            
                7.68
             |                                 
            
                114,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/13/2011
             | 
            
                +0.90 / +2.37%
             |             
            
                37.70
             |           
            
                38.90
             |               
            
                37.70
             |                           
            
                38.90
             | 
            
                38.90
             |                     
            
                7.57
             |                                 
            
                101,740
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2011
             | 
            
                -0.10 / -0.26%
             |             
            
                38.10
             |           
            
                39.00
             |               
            
                38.00
             |                           
            
                38.00
             | 
            
                38.00
             |                     
            
                7.39
             |                                 
            
                66,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2011
             | 
            
                -0.90 / -2.31%
             |             
            
                39.00
             |           
            
                39.00
             |               
            
                38.00
             |                           
            
                38.10
             | 
            
                38.10
             |                     
            
                7.41
             |                                 
            
                87,880
             |            
            
                 
             |                                       
         
    
        
            | 
                1/10/2011
             | 
            
                -0.30 / -0.76%
             |             
            
                39.30
             |           
            
                39.40
             |               
            
                38.50
             |                           
            
                39.00
             | 
            
                39.00
             |                     
            
                7.59
             |                                 
            
                95,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/7/2011
             | 
            
                -0.50 / -1.26%
             |             
            
                40.00
             |           
            
                40.00
             |               
            
                39.30
             |                           
            
                39.30
             | 
            
                39.30
             |                     
            
                7.65
             |                                 
            
                60,010
             |            
            
                 
             |                                       
         
    
        
            | 
                1/6/2011
             | 
            
                -0.10 / -0.25%
             |             
            
                39.90
             |           
            
                39.90
             |               
            
                39.60
             |                           
            
                39.80
             | 
            
                39.80
             |                     
            
                7.74
             |                                 
            
                57,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/5/2011
             | 
            
                -1.00 / -2.44%
             |             
            
                40.10
             |           
            
                40.30
             |               
            
                39.80
             |                           
            
                39.90
             | 
            
                39.90
             |                     
            
                7.76
             |                                 
            
                149,160
             |            
            
                 
             |                                       
         
    
        
            | 
                1/4/2011
             | 
            
                -0.10 / -0.24%
             |             
            
                41.50
             |           
            
                41.50
             |               
            
                40.30
             |                           
            
                40.90
             | 
            
                40.90
             |                     
            
                7.96
             |                                 
            
                121,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/31/2010
             | 
            
                +1.70 / +4.33%
             |             
            
                39.80
             |           
            
                41.00
             |               
            
                39.00
             |                           
            
                41.00
             | 
            
                41.00
             |                     
            
                7.98
             |                                 
            
                206,730
             |            
            
                 
             |                                       
         
    
        
            | 
                12/30/2010
             | 
            
                -0.30 / -0.76%
             |             
            
                39.90
             |           
            
                39.90
             |               
            
                39.30
             |                           
            
                39.30
             | 
            
                39.30
             |                     
            
                7.65
             |                                 
            
                133,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/29/2010
             | 
            
                +0.30 / +0.76%
             |             
            
                40.40
             |           
            
                40.40
             |               
            
                39.10
             |                           
            
                39.60
             | 
            
                39.60
             |                     
            
                7.70
             |                                 
            
                176,190
             |            
            
                 
             |                                       
         
    
        
            | 
                12/28/2010
             | 
            
                +0.60 / +1.55%
             |             
            
                38.50
             |           
            
                39.80
             |               
            
                38.50
             |                           
            
                39.30
             | 
            
                39.30
             |                     
            
                7.65
             |                                 
            
                281,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/27/2010
             | 
            
                -1.10 / -2.76%
             |             
            
                40.00
             |           
            
                40.00
             |               
            
                38.60
             |                           
            
                38.70
             | 
            
                38.70
             |                     
            
                7.53
             |                                 
            
                236,910
             |            
            
                 
             |                                       
         
    
        
            | 
                12/24/2010
             | 
            
                -0.30 / -0.75%
             |             
            
                40.50
             |           
            
                40.50
             |               
            
                39.70
             |                           
            
                39.80
             | 
            
                39.80
             |                     
            
                7.74
             |                                 
            
                177,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/23/2010
             | 
            
                -0.30 / -0.74%
             |             
            
                39.60
             |           
            
                40.80
             |               
            
                39.60
             |                           
            
                40.10
             | 
            
                40.10
             |                     
            
                7.80
             |                                 
            
                316,780
             |            
            
                 
             |                                       
         
    
        
            | 
                12/22/2010
             | 
            
                -1.10 / -2.65%
             |             
            
                41.90
             |           
            
                41.90
             |               
            
                40.40
             |                           
            
                40.40
             | 
            
                40.40
             |                     
            
                7.86
             |                                 
            
                331,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/21/2010
             | 
            
                -1.10 / -2.58%
             |             
            
                41.10
             |           
            
                43.00
             |               
            
                41.00
             |                           
            
                41.50
             | 
            
                41.50
             |                     
            
                7.88
             |                                 
            
                616,650
             |            
            
                 
             |                                       
         
    
        
            | 
                12/20/2010
             | 
            
                -1.90 / -4.27%
             |             
            
                43.00
             |           
            
                44.20
             |               
            
                42.60
             |                           
            
                42.60
             | 
            
                42.60
             |                     
            
                8.09
             |                                 
            
                645,610
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/17/2010
             | 
            
                +1.70 / +3.97%
             |             
            
                43.00
             |           
            
                44.50
             |               
            
                41.00
             |                           
            
                44.50
             | 
            
                44.50
             |                     
            
                8.45
             |                                 
            
                389,440
             |            
            
                 
             |                                       
         
    
        
            | 
                12/16/2010
             | 
            
                -2.20 / -4.89%
             |             
            
                42.90
             |           
            
                44.00
             |               
            
                42.80
             |                           
            
                42.80
             | 
            
                42.80
             |                     
            
                8.13
             |                                 
            
                585,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/15/2010
             | 
            
                +1.20 / +2.74%
             |             
            
                45.90
             |           
            
                45.90
             |               
            
                44.60
             |                           
            
                45.00
             | 
            
                45.00
             |                     
            
                8.54
             |                                 
            
                858,460
             |            
            
                 
             |                                       
         
    
        
            | 
                12/14/2010
             | 
            
                +2.00 / +4.78%
             |             
            
                43.80
             |           
            
                43.80
             |               
            
                41.80
             |                           
            
                43.80
             | 
            
                43.80
             |                     
            
                8.32
             |                                 
            
                1,873,380
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/13/2010
             | 
            
                +1.90 / +4.76%
             |             
            
                41.80
             |           
            
                41.80
             |               
            
                41.80
             |                           
            
                41.80
             | 
            
                41.80
             |                     
            
                7.94
             |                                 
            
                22,720
             |            
            
                 
             |                                       
         
    
        
            | 
                12/10/2010
             | 
            
                +1.90 / +5.00%
             |             
            
                39.90
             |           
            
                39.90
             |               
            
                39.30
             |                           
            
                39.90
             | 
            
                39.90
             |                     
            
                7.58
             |                                 
            
                596,420
             |  
            
                 
             |                                                              
             
    
         
    
    
 |