| 
                 
                    Closing price on 4/24/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    20.00 | 
                 
                
                    | High | 
                    21.30 | 
                 
                
                    | Low | 
                    19.60 | 
                     
                
                    | Volume | 
                    374,260 | 
                                 
                
                    | Split-adjusted Price | 
                    5.53 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DIG Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/24/2012
             | 
            
                +1.00 / +4.93%
             |             
            
                20.00
             |           
            
                21.30
             |               
            
                19.60
             |                           
            
                21.30
             | 
            
                21.30
             |                     
            
                5.53
             |                                 
            
                374,260
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2012
             | 
            
                +0.10 / +0.50%
             |             
            
                20.20
             |           
            
                20.70
             |               
            
                20.00
             |                           
            
                20.30
             | 
            
                20.30
             |                     
            
                5.27
             |                                 
            
                258,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2012
             | 
            
                -1.00 / -4.72%
             |             
            
                20.60
             |           
            
                21.00
             |               
            
                20.20
             |                           
            
                20.20
             | 
            
                20.20
             |                     
            
                5.24
             |                                 
            
                436,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2012
             | 
            
                -1.10 / -4.93%
             |             
            
                21.70
             |           
            
                21.90
             |               
            
                21.20
             |                           
            
                21.20
             | 
            
                21.20
             |                     
            
                5.50
             |                                 
            
                492,003
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2012
             | 
            
                -0.30 / -1.33%
             |             
            
                23.00
             |           
            
                23.10
             |               
            
                21.70
             |                           
            
                22.30
             | 
            
                22.30
             |                     
            
                5.78
             |                                 
            
                583,330
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2012
             | 
            
                +1.00 / +4.63%
             |             
            
                22.20
             |           
            
                22.60
             |               
            
                21.60
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                5.86
             |                                 
            
                642,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2012
             | 
            
                +1.00 / +4.85%
             |             
            
                20.60
             |           
            
                21.60
             |               
            
                20.60
             |                           
            
                21.60
             | 
            
                21.60
             |                     
            
                5.60
             |                                 
            
                236,520
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2012
             | 
            
                +0.30 / +1.48%
             |             
            
                20.50
             |           
            
                21.30
             |               
            
                20.30
             |                           
            
                20.60
             | 
            
                20.60
             |                     
            
                5.34
             |                                 
            
                556,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2012
             | 
            
                +0.90 / +4.64%
             |             
            
                20.30
             |           
            
                20.30
             |               
            
                20.00
             |                           
            
                20.30
             | 
            
                20.30
             |                     
            
                5.27
             |                                 
            
                386,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2012
             | 
            
                +0.90 / +4.86%
             |             
            
                19.00
             |           
            
                19.40
             |               
            
                18.70
             |                           
            
                19.40
             | 
            
                19.40
             |                     
            
                5.03
             |                                 
            
                543,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2012
             | 
            
                -0.10 / -0.54%
             |             
            
                19.00
             |           
            
                19.00
             |               
            
                18.00
             |                           
            
                18.50
             | 
            
                18.50
             |                     
            
                4.80
             |                                 
            
                193,410
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2012
             | 
            
                +0.30 / +1.64%
             |             
            
                18.70
             |           
            
                19.00
             |               
            
                18.50
             |                           
            
                18.60
             | 
            
                18.60
             |                     
            
                4.82
             |                                 
            
                184,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2012
             | 
            
                +0.80 / +4.57%
             |             
            
                17.50
             |           
            
                18.30
             |               
            
                17.50
             |                           
            
                18.30
             | 
            
                18.30
             |                     
            
                4.75
             |                                 
            
                457,860
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2012
             | 
            
                +0.30 / +1.74%
             |             
            
                16.80
             |           
            
                17.50
             |               
            
                16.80
             |                           
            
                17.50
             | 
            
                17.50
             |                     
            
                4.54
             |                                 
            
                152,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2012
             | 
            
                +0.10 / +0.58%
             |             
            
                17.20
             |           
            
                17.80
             |               
            
                16.80
             |                           
            
                17.20
             | 
            
                17.20
             |                     
            
                4.46
             |                                 
            
                155,030
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2012
             | 
            
                +0.40 / +2.40%
             |             
            
                16.50
             |           
            
                17.20
             |               
            
                16.40
             |                           
            
                17.10
             | 
            
                17.10
             |                     
            
                4.44
             |                                 
            
                132,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2012
             | 
            
                -0.80 / -4.57%
             |             
            
                17.20
             |           
            
                17.50
             |               
            
                16.70
             |                           
            
                16.70
             | 
            
                16.70
             |                     
            
                4.33
             |                                 
            
                242,850
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2012
             | 
            
                -0.50 / -2.78%
             |             
            
                17.70
             |           
            
                18.00
             |               
            
                17.50
             |                           
            
                17.50
             | 
            
                17.50
             |                     
            
                4.54
             |                                 
            
                175,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2012
             | 
            
                +0.20 / +1.12%
             |             
            
                17.80
             |           
            
                18.00
             |               
            
                17.30
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                4.67
             |                                 
            
                237,710
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2012
             | 
            
                -0.90 / -4.81%
             |             
            
                18.50
             |           
            
                18.80
             |               
            
                17.80
             |                           
            
                17.80
             | 
            
                17.80
             |                     
            
                4.62
             |                                 
            
                361,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2012
             | 
            
                +0.40 / +2.19%
             |             
            
                18.60
             |           
            
                19.00
             |               
            
                18.10
             |                           
            
                18.70
             | 
            
                18.70
             |                     
            
                4.85
             |                                 
            
                347,380
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2012
             | 
            
                -0.20 / -1.08%
             |             
            
                18.50
             |           
            
                18.60
             |               
            
                18.00
             |                           
            
                18.30
             | 
            
                18.30
             |                     
            
                4.75
             |                                 
            
                372,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2012
             | 
            
                +0.30 / +1.65%
             |             
            
                18.40
             |           
            
                18.50
             |               
            
                18.00
             |                           
            
                18.50
             | 
            
                18.50
             |                     
            
                4.80
             |                                 
            
                166,050
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2012
             | 
            
                +0.80 / +4.60%
             |             
            
                17.40
             |           
            
                18.20
             |               
            
                17.40
             |                           
            
                18.20
             | 
            
                18.20
             |                     
            
                4.72
             |                                 
            
                603,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2012
             | 
            
                +0.40 / +2.35%
             |             
            
                17.20
             |           
            
                17.50
             |               
            
                17.00
             |                           
            
                17.40
             | 
            
                17.40
             |                     
            
                4.51
             |                                 
            
                111,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2012
             | 
            
                -0.20 / -1.16%
             |             
            
                17.20
             |           
            
                17.90
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.41
             |                                 
            
                302,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2012
             | 
            
                -0.70 / -3.91%
             |             
            
                18.20
             |           
            
                18.50
             |               
            
                17.20
             |                           
            
                17.20
             | 
            
                17.20
             |                     
            
                4.46
             |                                 
            
                574,360
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2012
             | 
            
                +0.80 / +4.68%
             |             
            
                17.00
             |           
            
                17.90
             |               
            
                16.70
             |                           
            
                17.90
             | 
            
                17.90
             |                     
            
                4.64
             |                                 
            
                271,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2012
             | 
            
                +0.50 / +3.01%
             |             
            
                17.00
             |           
            
                17.40
             |               
            
                16.60
             |                           
            
                17.10
             | 
            
                17.10
             |                     
            
                4.44
             |                                 
            
                305,040
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2012
             | 
            
                +0.10 / +0.61%
             |             
            
                17.00
             |           
            
                17.00
             |               
            
                16.10
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                4.31
             |                                 
            
                103,250
             |  
            
                 
             |                                                              
             
    
         
    
    
 |