| 
                 
                    Closing price on 5/26/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.80 | 
                 
                
                    | High | 
                    12.10 | 
                 
                
                    | Low | 
                    10.70 | 
                     
                
                    | Volume | 
                    211,600 | 
                                 
                
                    | Split-adjusted Price | 
                    1.42 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DBC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/26/2011
             | 
            
                +0.70 / +6.14%
             |             
            
                10.80
             |           
            
                12.10
             |               
            
                10.70
             |                           
            
                12.10
             | 
            
                11.58
             |                     
            
                1.42
             |                                 
            
                211,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2011
             | 
            
                -0.60 / -5.00%
             |             
            
                11.70
             |           
            
                11.90
             |               
            
                11.30
             |                           
            
                11.40
             | 
            
                11.37
             |                     
            
                1.34
             |                                 
            
                384,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2011
             | 
            
                -0.70 / -5.51%
             |             
            
                12.20
             |           
            
                12.70
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.11
             |                     
            
                1.41
             |                                 
            
                245,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2011
             | 
            
                -0.90 / -6.62%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                12.70
             |                           
            
                12.70
             | 
            
                12.93
             |                     
            
                1.49
             |                                 
            
                169,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2011
             | 
            
                +0.60 / +4.62%
             |             
            
                13.10
             |           
            
                13.80
             |               
            
                13.00
             |                           
            
                13.60
             | 
            
                13.46
             |                     
            
                1.60
             |                                 
            
                160,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2011
             | 
            
                -0.40 / -2.99%
             |             
            
                12.70
             |           
            
                13.50
             |               
            
                12.70
             |                           
            
                13.00
             | 
            
                13.13
             |                     
            
                1.52
             |                                 
            
                107,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.30
             |                           
            
                13.40
             | 
            
                13.59
             |                     
            
                1.57
             |                                 
            
                127,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2011
             | 
            
                -0.70 / -4.96%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                13.30
             |                           
            
                13.40
             | 
            
                13.48
             |                     
            
                1.57
             |                                 
            
                312,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2011
             | 
            
                -0.80 / -5.37%
             |             
            
                14.90
             |           
            
                14.90
             |               
            
                14.10
             |                           
            
                14.10
             | 
            
                14.33
             |                     
            
                1.65
             |                                 
            
                152,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2011
             | 
            
                -0.10 / -0.67%
             |             
            
                15.20
             |           
            
                15.20
             |               
            
                14.80
             |                           
            
                14.90
             | 
            
                14.90
             |                     
            
                1.75
             |                                 
            
                34,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/12/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.20
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.04
             |                     
            
                1.76
             |                                 
            
                60,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.90
             |           
            
                15.10
             |               
            
                14.90
             |                           
            
                15.00
             | 
            
                15.01
             |                     
            
                1.76
             |                                 
            
                109,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2011
             | 
            
                -0.30 / -1.96%
             |             
            
                15.40
             |           
            
                15.40
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.13
             |                     
            
                1.76
             |                                 
            
                53,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2011
             | 
            
                +0.20 / +1.32%
             |             
            
                15.20
             |           
            
                15.30
             |               
            
                14.90
             |                           
            
                15.30
             | 
            
                15.09
             |                     
            
                1.79
             |                                 
            
                59,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/6/2011
             | 
            
                +0.10 / +0.67%
             |             
            
                15.10
             |           
            
                15.20
             |               
            
                14.90
             |                           
            
                15.10
             | 
            
                15.03
             |                     
            
                1.77
             |                                 
            
                57,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2011
             | 
            
                -0.30 / -1.96%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.14
             |                     
            
                1.76
             |                                 
            
                62,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.60
             |           
            
                15.60
             |               
            
                15.10
             |                           
            
                15.30
             | 
            
                15.37
             |                     
            
                1.79
             |                                 
            
                53,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/29/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.70
             |           
            
                15.70
             |               
            
                15.30
             |                           
            
                15.30
             | 
            
                15.36
             |                     
            
                1.79
             |                                 
            
                77,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2011
             | 
            
                -0.50 / -3.16%
             |             
            
                15.80
             |           
            
                15.80
             |               
            
                15.10
             |                           
            
                15.30
             | 
            
                15.32
             |                     
            
                1.79
             |                                 
            
                53,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2011
             | 
            
                +0.10 / +0.64%
             |             
            
                15.80
             |           
            
                15.90
             |               
            
                15.50
             |                           
            
                15.80
             | 
            
                15.60
             |                     
            
                1.85
             |                                 
            
                53,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2011
             | 
            
                -0.70 / -4.27%
             |             
            
                16.00
             |           
            
                16.30
             |               
            
                15.60
             |                           
            
                15.70
             | 
            
                15.88
             |                     
            
                1.84
             |                                 
            
                67,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2011
             | 
            
                +0.80 / +5.13%
             |             
            
                16.00
             |           
            
                16.40
             |               
            
                15.90
             |                           
            
                16.40
             | 
            
                16.25
             |                     
            
                1.92
             |                                 
            
                142,466
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2011
             | 
            
                +0.10 / +0.65%
             |             
            
                15.20
             |           
            
                15.80
             |               
            
                15.20
             |                           
            
                15.60
             | 
            
                15.50
             |                     
            
                1.83
             |                                 
            
                205,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2011
             | 
            
                -0.50 / -3.13%
             |             
            
                16.00
             |           
            
                16.20
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.77
             |                     
            
                1.82
             |                                 
            
                176,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2011
             | 
            
                -0.60 / -3.61%
             |             
            
                16.60
             |           
            
                16.70
             |               
            
                16.00
             |                           
            
                16.00
             | 
            
                16.27
             |                     
            
                1.88
             |                                 
            
                185,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2011
             | 
            
                -0.30 / -1.78%
             |             
            
                16.10
             |           
            
                17.00
             |               
            
                16.10
             |                           
            
                16.60
             | 
            
                16.67
             |                     
            
                1.95
             |                                 
            
                149,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2011
             | 
            
                -0.40 / -2.31%
             |             
            
                17.30
             |           
            
                17.30
             |               
            
                16.90
             |                           
            
                16.90
             | 
            
                17.09
             |                     
            
                1.98
             |                                 
            
                100,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2011
             | 
            
                -0.40 / -2.26%
             |             
            
                17.70
             |           
            
                17.70
             |               
            
                17.20
             |                           
            
                17.30
             | 
            
                17.37
             |                     
            
                2.03
             |                                 
            
                59,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                17.60
             |           
            
                17.80
             |               
            
                17.50
             |                           
            
                17.70
             | 
            
                17.66
             |                     
            
                2.08
             |                                 
            
                87,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2011
             | 
            
                -0.20 / -1.12%
             |             
            
                17.90
             |           
            
                17.90
             |               
            
                17.70
             |                           
            
                17.70
             | 
            
                17.78
             |                     
            
                2.08
             |                                 
            
                52,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |