| 
                 
                    Closing price on 3/17/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    29.20 | 
                 
                
                    | High | 
                    29.50 | 
                 
                
                    | Low | 
                    28.70 | 
                     
                
                    | Volume | 
                    177,340 | 
                                 
                
                    | Split-adjusted Price | 
                    5.66 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DIG Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/17/2011
             | 
            
                0.00 / 0.00%
             |             
            
                29.20
             |           
            
                29.50
             |               
            
                28.70
             |                           
            
                29.10
             | 
            
                29.10
             |                     
            
                5.66
             |                                 
            
                177,340
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2011
             | 
            
                -0.10 / -0.34%
             |             
            
                29.20
             |           
            
                29.60
             |               
            
                28.50
             |                           
            
                29.10
             | 
            
                29.10
             |                     
            
                5.66
             |                                 
            
                181,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2011
             | 
            
                +0.40 / +1.39%
             |             
            
                28.80
             |           
            
                30.20
             |               
            
                28.60
             |                           
            
                29.20
             | 
            
                29.20
             |                     
            
                5.68
             |                                 
            
                531,870
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                30.20
             |           
            
                30.20
             |               
            
                28.40
             |                           
            
                28.80
             | 
            
                28.80
             |                     
            
                5.60
             |                                 
            
                693,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/11/2011
             | 
            
                +1.30 / +4.73%
             |             
            
                28.80
             |           
            
                28.80
             |               
            
                28.80
             |                           
            
                28.80
             | 
            
                28.80
             |                     
            
                5.60
             |                                 
            
                97,370
             |            
            
                 
             |                                       
         
    
        
            | 
                3/10/2011
             | 
            
                +1.30 / +4.96%
             |             
            
                26.50
             |           
            
                27.50
             |               
            
                26.40
             |                           
            
                27.50
             | 
            
                27.50
             |                     
            
                5.35
             |                                 
            
                305,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/9/2011
             | 
            
                -0.70 / -2.60%
             |             
            
                26.90
             |           
            
                26.90
             |               
            
                25.60
             |                           
            
                26.20
             | 
            
                26.20
             |                     
            
                5.10
             |                                 
            
                78,880
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2011
             | 
            
                +0.10 / +0.37%
             |             
            
                27.00
             |           
            
                27.10
             |               
            
                26.80
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                5.23
             |                                 
            
                117,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2011
             | 
            
                -0.10 / -0.37%
             |             
            
                26.90
             |           
            
                27.10
             |               
            
                26.50
             |                           
            
                26.80
             | 
            
                26.80
             |                     
            
                5.21
             |                                 
            
                115,410
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                27.90
             |           
            
                27.90
             |               
            
                26.80
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                5.23
             |                                 
            
                108,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/3/2011
             | 
            
                -1.10 / -3.93%
             |             
            
                27.50
             |           
            
                27.50
             |               
            
                26.80
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                5.23
             |                                 
            
                250,830
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2011
             | 
            
                -1.40 / -4.76%
             |             
            
                28.50
             |           
            
                29.00
             |               
            
                28.00
             |                           
            
                28.00
             | 
            
                28.00
             |                     
            
                5.45
             |                                 
            
                294,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2011
             | 
            
                -0.10 / -0.34%
             |             
            
                29.50
             |           
            
                29.50
             |               
            
                28.70
             |                           
            
                29.40
             | 
            
                29.40
             |                     
            
                5.72
             |                                 
            
                84,550
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2011
             | 
            
                -0.30 / -1.01%
             |             
            
                29.20
             |           
            
                30.00
             |               
            
                29.20
             |                           
            
                29.50
             | 
            
                29.50
             |                     
            
                5.74
             |                                 
            
                54,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2011
             | 
            
                +0.40 / +1.36%
             |             
            
                30.10
             |           
            
                30.10
             |               
            
                29.30
             |                           
            
                29.80
             | 
            
                29.80
             |                     
            
                5.80
             |                                 
            
                66,730
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2011
             | 
            
                -1.10 / -3.61%
             |             
            
                30.50
             |           
            
                30.50
             |               
            
                29.00
             |                           
            
                29.40
             | 
            
                29.40
             |                     
            
                5.72
             |                                 
            
                249,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/23/2011
             | 
            
                0.00 / 0.00%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                30.40
             |                           
            
                30.50
             | 
            
                30.50
             |                     
            
                5.93
             |                                 
            
                133,940
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2011
             | 
            
                -1.50 / -4.69%
             |             
            
                30.40
             |           
            
                31.50
             |               
            
                30.40
             |                           
            
                30.50
             | 
            
                30.50
             |                     
            
                5.93
             |                                 
            
                226,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2011
             | 
            
                -1.60 / -4.76%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                32.00
             |                           
            
                32.00
             | 
            
                32.00
             |                     
            
                6.23
             |                                 
            
                75,230
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2011
             | 
            
                -1.00 / -2.89%
             |             
            
                33.80
             |           
            
                34.00
             |               
            
                33.50
             |                           
            
                33.60
             | 
            
                33.60
             |                     
            
                6.54
             |                                 
            
                127,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2011
             | 
            
                -1.40 / -3.89%
             |             
            
                35.40
             |           
            
                36.00
             |               
            
                34.50
             |                           
            
                34.60
             | 
            
                34.60
             |                     
            
                6.73
             |                                 
            
                144,210
             |            
            
                 
             |                                       
         
    
        
            | 
                2/16/2011
             | 
            
                -0.50 / -1.37%
             |             
            
                36.30
             |           
            
                36.50
             |               
            
                36.00
             |                           
            
                36.00
             | 
            
                36.00
             |                     
            
                7.00
             |                                 
            
                172,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/15/2011
             | 
            
                -0.80 / -2.14%
             |             
            
                36.40
             |           
            
                36.90
             |               
            
                36.20
             |                           
            
                36.50
             | 
            
                36.50
             |                     
            
                7.10
             |                                 
            
                131,470
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2011
             | 
            
                -0.50 / -1.32%
             |             
            
                38.00
             |           
            
                38.00
             |               
            
                37.30
             |                           
            
                37.30
             | 
            
                37.30
             |                     
            
                7.26
             |                                 
            
                45,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/11/2011
             | 
            
                -0.10 / -0.26%
             |             
            
                37.50
             |           
            
                37.90
             |               
            
                37.50
             |                           
            
                37.80
             | 
            
                37.80
             |                     
            
                7.35
             |                                 
            
                134,780
             |            
            
                 
             |                                       
         
    
        
            | 
                2/10/2011
             | 
            
                +0.10 / +0.26%
             |             
            
                38.00
             |           
            
                38.10
             |               
            
                37.90
             |                           
            
                37.90
             | 
            
                37.90
             |                     
            
                7.37
             |                                 
            
                98,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/9/2011
             | 
            
                -0.80 / -2.07%
             |             
            
                38.20
             |           
            
                38.90
             |               
            
                37.80
             |                           
            
                37.80
             | 
            
                37.80
             |                     
            
                7.35
             |                                 
            
                96,850
             |            
            
                 
             |                                       
         
    
        
            | 
                2/8/2011
             | 
            
                +0.60 / +1.58%
             |             
            
                38.60
             |           
            
                38.70
             |               
            
                38.40
             |                           
            
                38.60
             | 
            
                38.60
             |                     
            
                7.51
             |                                 
            
                96,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                38.10
             |           
            
                38.10
             |               
            
                38.00
             |                           
            
                38.00
             | 
            
                38.00
             |                     
            
                7.39
             |                                 
            
                133,540
             |            
            
                 
             |                                       
         
    
        
            | 
                1/27/2011
             | 
            
                +0.20 / +0.53%
             |             
            
                38.20
             |           
            
                38.20
             |               
            
                37.80
             |                           
            
                38.00
             | 
            
                38.00
             |                     
            
                7.39
             |                                 
            
                176,370
             |  
            
                 
             |                                                              
             
    
         
    
    
 |