| 
                 
                    Closing price on 6/4/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    21.10 | 
                 
                
                    | High | 
                    21.70 | 
                 
                
                    | Low | 
                    20.80 | 
                     
                
                    | Volume | 
                    200,100 | 
                                 
                
                    | Split-adjusted Price | 
                    8.56 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DQC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/4/2012
             | 
            
                -0.10 / -0.46%
             |             
            
                21.10
             |           
            
                21.70
             |               
            
                20.80
             |                           
            
                21.70
             | 
            
                21.70
             |                     
            
                8.56
             |                                 
            
                200,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2012
             | 
            
                -1.10 / -4.80%
             |             
            
                22.90
             |           
            
                23.00
             |               
            
                21.80
             |                           
            
                21.80
             | 
            
                21.80
             |                     
            
                8.60
             |                                 
            
                170,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2012
             | 
            
                -0.30 / -1.29%
             |             
            
                22.60
             |           
            
                23.20
             |               
            
                22.10
             |                           
            
                22.90
             | 
            
                22.90
             |                     
            
                9.04
             |                                 
            
                138,770
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2012
             | 
            
                +0.10 / +0.43%
             |             
            
                23.70
             |           
            
                23.90
             |               
            
                23.20
             |                           
            
                23.20
             | 
            
                23.20
             |                     
            
                9.15
             |                                 
            
                187,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2012
             | 
            
                +1.10 / +5.00%
             |             
            
                21.30
             |           
            
                23.10
             |               
            
                21.30
             |                           
            
                23.10
             | 
            
                23.10
             |                     
            
                9.12
             |                                 
            
                360,250
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2012
             | 
            
                +1.00 / +4.76%
             |             
            
                22.00
             |           
            
                22.00
             |               
            
                21.90
             |                           
            
                22.00
             | 
            
                22.00
             |                     
            
                8.68
             |                                 
            
                345,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2012
             | 
            
                +1.00 / +5.00%
             |             
            
                21.00
             |           
            
                21.00
             |               
            
                21.00
             |                           
            
                21.00
             | 
            
                21.00
             |                     
            
                8.29
             |                                 
            
                44,240
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2012
             | 
            
                -0.90 / -4.31%
             |             
            
                21.00
             |           
            
                21.00
             |               
            
                19.90
             |                           
            
                20.00
             | 
            
                20.00
             |                     
            
                7.89
             |                                 
            
                222,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2012
             | 
            
                -1.10 / -5.00%
             |             
            
                21.40
             |           
            
                22.40
             |               
            
                20.90
             |                           
            
                20.90
             | 
            
                20.90
             |                     
            
                8.25
             |                                 
            
                217,410
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2012
             | 
            
                +0.50 / +2.33%
             |             
            
                22.00
             |           
            
                22.50
             |               
            
                21.40
             |                           
            
                22.00
             | 
            
                22.00
             |                     
            
                8.68
             |                                 
            
                308,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2012
             | 
            
                +1.00 / +4.88%
             |             
            
                20.60
             |           
            
                21.50
             |               
            
                20.60
             |                           
            
                21.50
             | 
            
                21.50
             |                     
            
                8.48
             |                                 
            
                124,180
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2012
             | 
            
                -1.00 / -4.65%
             |             
            
                21.50
             |           
            
                21.50
             |               
            
                20.50
             |                           
            
                20.50
             | 
            
                20.50
             |                     
            
                8.09
             |                                 
            
                202,360
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2012
             | 
            
                +0.70 / +3.37%
             |             
            
                21.00
             |           
            
                21.80
             |               
            
                20.90
             |                           
            
                21.50
             | 
            
                21.50
             |                     
            
                8.48
             |                                 
            
                297,670
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2012
             | 
            
                -1.00 / -4.59%
             |             
            
                21.60
             |           
            
                22.00
             |               
            
                20.80
             |                           
            
                20.80
             | 
            
                20.80
             |                     
            
                8.21
             |                                 
            
                354,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2012
             | 
            
                -1.10 / -4.80%
             |             
            
                22.10
             |           
            
                22.90
             |               
            
                21.80
             |                           
            
                21.80
             | 
            
                21.80
             |                     
            
                8.60
             |                                 
            
                331,560
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2012
             | 
            
                -1.20 / -4.98%
             |             
            
                24.00
             |           
            
                24.40
             |               
            
                22.90
             |                           
            
                22.90
             | 
            
                22.90
             |                     
            
                9.04
             |                                 
            
                322,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2012
             | 
            
                -1.20 / -4.74%
             |             
            
                25.50
             |           
            
                25.60
             |               
            
                24.10
             |                           
            
                24.10
             | 
            
                24.10
             |                     
            
                9.51
             |                                 
            
                350,560
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2012
             | 
            
                -0.70 / -2.69%
             |             
            
                27.00
             |           
            
                27.00
             |               
            
                24.70
             |                           
            
                25.30
             | 
            
                25.30
             |                     
            
                9.98
             |                                 
            
                413,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2012
             | 
            
                +0.20 / +0.78%
             |             
            
                25.70
             |           
            
                26.90
             |               
            
                25.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                10.26
             |                                 
            
                548,540
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2012
             | 
            
                +0.90 / +3.61%
             |             
            
                26.10
             |           
            
                26.10
             |               
            
                25.30
             |                           
            
                25.80
             | 
            
                25.80
             |                     
            
                10.18
             |                                 
            
                885,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2012
             | 
            
                +1.10 / +4.62%
             |             
            
                24.90
             |           
            
                24.90
             |               
            
                24.90
             |                           
            
                24.90
             | 
            
                24.90
             |                     
            
                9.83
             |                                 
            
                35,110
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2012
             | 
            
                +1.10 / +4.85%
             |             
            
                23.80
             |           
            
                23.80
             |               
            
                23.70
             |                           
            
                23.80
             | 
            
                23.80
             |                     
            
                9.39
             |                                 
            
                179,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/3/2012
             | 
            
                -0.20 / -0.87%
             |             
            
                22.20
             |           
            
                23.00
             |               
            
                21.80
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                8.96
             |                                 
            
                524,340
             |            
            
                 
             |                                       
         
    
        
            | 
                5/2/2012
             | 
            
                -1.20 / -4.98%
             |             
            
                23.50
             |           
            
                24.20
             |               
            
                22.90
             |                           
            
                22.90
             | 
            
                22.90
             |                     
            
                9.04
             |                                 
            
                438,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2012
             | 
            
                +0.40 / +1.69%
             |             
            
                23.70
             |           
            
                24.80
             |               
            
                23.20
             |                           
            
                24.10
             | 
            
                24.10
             |                     
            
                9.51
             |                                 
            
                465,990
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2012
             | 
            
                +0.40 / +1.72%
             |             
            
                23.80
             |           
            
                24.40
             |               
            
                23.60
             |                           
            
                23.70
             | 
            
                23.70
             |                     
            
                9.35
             |                                 
            
                602,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2012
             | 
            
                +1.10 / +4.95%
             |             
            
                23.20
             |           
            
                23.30
             |               
            
                23.00
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                9.19
             |                                 
            
                269,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2012
             | 
            
                +1.00 / +4.72%
             |             
            
                21.80
             |           
            
                22.20
             |               
            
                21.30
             |                           
            
                22.20
             | 
            
                22.20
             |                     
            
                8.76
             |                                 
            
                231,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2012
             | 
            
                +1.00 / +4.95%
             |             
            
                20.90
             |           
            
                21.20
             |               
            
                20.30
             |                           
            
                21.20
             | 
            
                21.20
             |                     
            
                8.37
             |                                 
            
                146,940
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2012
             | 
            
                +0.90 / +4.66%
             |             
            
                19.30
             |           
            
                20.20
             |               
            
                19.30
             |                           
            
                20.20
             | 
            
                20.20
             |                     
            
                7.97
             |                                 
            
                451,430
             |  
            
                 
             |                                                              
             
    
         
    
    
 |