| 
                 
                    Closing price on 1/26/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    21.90 | 
                 
                
                    | High | 
                    23.00 | 
                 
                
                    | Low | 
                    21.90 | 
                     
                
                    | Volume | 
                    82,700 | 
                                 
                
                    | Split-adjusted Price | 
                    2.69 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DBC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                1/26/2011
             | 
            
                +1.10 / +5.05%
             |             
            
                21.90
             |           
            
                23.00
             |               
            
                21.90
             |                           
            
                22.90
             | 
            
                22.64
             |                     
            
                2.69
             |                                 
            
                82,700
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2011
             | 
            
                -0.20 / -0.91%
             |             
            
                22.10
             |           
            
                22.10
             |               
            
                21.70
             |                           
            
                21.80
             | 
            
                21.86
             |                     
            
                2.56
             |                                 
            
                252,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2011
             | 
            
                -0.40 / -1.79%
             |             
            
                22.60
             |           
            
                22.60
             |               
            
                21.80
             |                           
            
                22.00
             | 
            
                22.13
             |                     
            
                2.58
             |                                 
            
                163,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2011
             | 
            
                -0.40 / -1.75%
             |             
            
                22.90
             |           
            
                23.40
             |               
            
                22.30
             |                           
            
                22.40
             | 
            
                22.60
             |                     
            
                2.63
             |                                 
            
                207,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/20/2011
             | 
            
                -0.10 / -0.44%
             |             
            
                22.80
             |           
            
                23.20
             |               
            
                22.70
             |                           
            
                22.80
             | 
            
                22.95
             |                     
            
                2.67
             |                                 
            
                104,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                23.20
             |           
            
                23.90
             |               
            
                22.50
             |                           
            
                22.90
             | 
            
                22.99
             |                     
            
                2.69
             |                                 
            
                116,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2011
             | 
            
                -0.30 / -1.29%
             |             
            
                23.40
             |           
            
                24.20
             |               
            
                22.50
             |                           
            
                22.90
             | 
            
                23.29
             |                     
            
                2.69
             |                                 
            
                268,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2011
             | 
            
                0.00 / 0.00%
             |             
            
                23.20
             |           
            
                24.00
             |               
            
                23.00
             |                           
            
                23.20
             | 
            
                23.43
             |                     
            
                2.72
             |                                 
            
                116,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/14/2011
             | 
            
                +0.60 / +2.65%
             |             
            
                22.80
             |           
            
                23.20
             |               
            
                22.60
             |                           
            
                23.20
             | 
            
                22.85
             |                     
            
                2.72
             |                                 
            
                124,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/13/2011
             | 
            
                -1.60 / -6.61%
             |             
            
                22.50
             |           
            
                23.20
             |               
            
                22.40
             |                           
            
                22.60
             | 
            
                22.74
             |                     
            
                2.65
             |                                 
            
                68,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/12/2011
             | 
            
                +0.70 / +2.98%
             |             
            
                24.00
             |           
            
                24.70
             |               
            
                23.70
             |                           
            
                24.20
             | 
            
                24.01
             |                     
            
                2.66
             |                                 
            
                137,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2011
             | 
            
                -0.20 / -0.84%
             |             
            
                23.60
             |           
            
                23.80
             |               
            
                23.00
             |                           
            
                23.50
             | 
            
                23.40
             |                     
            
                2.58
             |                                 
            
                195,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/10/2011
             | 
            
                -0.90 / -3.66%
             |             
            
                24.70
             |           
            
                24.70
             |               
            
                23.70
             |                           
            
                23.70
             | 
            
                24.04
             |                     
            
                2.61
             |                                 
            
                213,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/7/2011
             | 
            
                -0.50 / -1.99%
             |             
            
                24.00
             |           
            
                25.00
             |               
            
                24.00
             |                           
            
                24.60
             | 
            
                24.65
             |                     
            
                2.71
             |                                 
            
                146,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/6/2011
             | 
            
                -0.20 / -0.79%
             |             
            
                24.60
             |           
            
                25.10
             |               
            
                24.40
             |                           
            
                25.10
             | 
            
                24.68
             |                     
            
                2.76
             |                                 
            
                349,200
             |            
            
                 
             |                                       
         
    
        
            | 
                1/5/2011
             | 
            
                -0.50 / -1.94%
             |             
            
                24.70
             |           
            
                26.00
             |               
            
                24.70
             |                           
            
                25.30
             | 
            
                25.20
             |                     
            
                2.78
             |                                 
            
                112,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/4/2011
             | 
            
                +1.40 / +5.74%
             |             
            
                25.80
             |           
            
                25.90
             |               
            
                25.40
             |                           
            
                25.80
             | 
            
                25.67
             |                     
            
                2.84
             |                                 
            
                115,900
             |            
            
                 
             |                                       
         
    
        
            | 
                12/31/2010
             | 
            
                -0.10 / -0.41%
             |             
            
                24.10
             |           
            
                25.30
             |               
            
                24.10
             |                           
            
                24.40
             | 
            
                24.63
             |                     
            
                2.68
             |                                 
            
                104,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/30/2010
             | 
            
                -0.80 / -3.16%
             |             
            
                25.80
             |           
            
                25.80
             |               
            
                24.50
             |                           
            
                24.50
             | 
            
                24.94
             |                     
            
                2.69
             |                                 
            
                124,300
             |            
            
                 
             |                                       
         
    
        
            | 
                12/29/2010
             | 
            
                -1.40 / -5.24%
             |             
            
                26.30
             |           
            
                26.30
             |               
            
                25.30
             |                           
            
                25.30
             | 
            
                25.79
             |                     
            
                2.78
             |                                 
            
                87,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/28/2010
             | 
            
                +1.20 / +4.71%
             |             
            
                25.90
             |           
            
                26.80
             |               
            
                25.60
             |                           
            
                26.70
             | 
            
                26.08
             |                     
            
                2.94
             |                                 
            
                139,500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/27/2010
             | 
            
                -0.10 / -0.39%
             |             
            
                26.80
             |           
            
                26.80
             |               
            
                25.30
             |                           
            
                25.50
             | 
            
                25.60
             |                     
            
                2.80
             |                                 
            
                47,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/24/2010
             | 
            
                +0.20 / +0.79%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                25.30
             |                           
            
                25.60
             | 
            
                25.52
             |                     
            
                2.81
             |                                 
            
                59,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/23/2010
             | 
            
                -0.70 / -2.68%
             |             
            
                25.30
             |           
            
                26.20
             |               
            
                25.30
             |                           
            
                25.40
             | 
            
                25.67
             |                     
            
                2.79
             |                                 
            
                65,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/22/2010
             | 
            
                -0.20 / -0.76%
             |             
            
                26.90
             |           
            
                26.90
             |               
            
                25.80
             |                           
            
                26.10
             | 
            
                26.19
             |                     
            
                2.87
             |                                 
            
                85,800
             |            
            
                 
             |                                       
         
    
        
            | 
                12/21/2010
             | 
            
                -0.30 / -1.13%
             |             
            
                26.90
             |           
            
                26.90
             |               
            
                25.50
             |                           
            
                26.30
             | 
            
                26.15
             |                     
            
                2.89
             |                                 
            
                75,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/20/2010
             | 
            
                -0.40 / -1.48%
             |             
            
                27.00
             |           
            
                27.50
             |               
            
                26.50
             |                           
            
                26.60
             | 
            
                26.76
             |                     
            
                2.92
             |                                 
            
                155,900
             |            
            
                 
             |                                       
         
    
        
            | 
                12/17/2010
             | 
            
                +1.10 / +4.25%
             |             
            
                27.00
             |           
            
                27.30
             |               
            
                25.80
             |                           
            
                27.00
             | 
            
                26.41
             |                     
            
                2.97
             |                                 
            
                267,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/16/2010
             | 
            
                -1.00 / -3.72%
             |             
            
                26.50
             |           
            
                26.50
             |               
            
                25.60
             |                           
            
                25.90
             | 
            
                25.98
             |                     
            
                2.85
             |                                 
            
                275,800
             |            
            
                 
             |                                       
         
    
        
            | 
                12/15/2010
             | 
            
                0.00 / 0.00%
             |             
            
                27.00
             |           
            
                27.90
             |               
            
                26.50
             |                           
            
                26.90
             | 
            
                27.13
             |                     
            
                2.96
             |                                 
            
                127,200
             |  
            
                 
             |                                                              
             
    
         
    
    
 |