| 
                 
                    Closing price on 4/5/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    23.60 | 
                 
                
                    | High | 
                    23.70 | 
                 
                
                    | Low | 
                    23.20 | 
                     
                
                    | Volume | 
                    14,600 | 
                                 
                
                    | Split-adjusted Price | 
                    23.70 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD7 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/5/2011
             | 
            
                +0.30 / +1.28%
             |             
            
                23.60
             |           
            
                23.70
             |               
            
                23.20
             |                           
            
                23.70
             | 
            
                23.70
             |                     
            
                23.70
             |                                 
            
                14,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2011
             | 
            
                -0.80 / -3.31%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                23.40
             |                           
            
                23.40
             | 
            
                23.40
             |                     
            
                23.40
             |                                 
            
                20,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2011
             | 
            
                -0.20 / -0.82%
             |             
            
                24.50
             |           
            
                24.50
             |               
            
                24.10
             |                           
            
                24.20
             | 
            
                24.20
             |                     
            
                24.20
             |                                 
            
                13,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2011
             | 
            
                -0.10 / -0.41%
             |             
            
                24.50
             |           
            
                24.70
             |               
            
                24.40
             |                           
            
                24.40
             | 
            
                24.40
             |                     
            
                24.40
             |                                 
            
                14,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2011
             | 
            
                -0.10 / -0.41%
             |             
            
                24.10
             |           
            
                24.60
             |               
            
                24.10
             |                           
            
                24.50
             | 
            
                24.50
             |                     
            
                24.50
             |                                 
            
                11,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2011
             | 
            
                -0.50 / -1.99%
             |             
            
                25.40
             |           
            
                25.40
             |               
            
                24.50
             |                           
            
                24.60
             | 
            
                24.60
             |                     
            
                24.60
             |                                 
            
                25,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2011
             | 
            
                +0.30 / +1.21%
             |             
            
                25.90
             |           
            
                25.90
             |               
            
                25.00
             |                           
            
                25.10
             | 
            
                25.10
             |                     
            
                25.10
             |                                 
            
                13,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2011
             | 
            
                -0.50 / -1.98%
             |             
            
                25.40
             |           
            
                25.90
             |               
            
                24.80
             |                           
            
                24.80
             | 
            
                24.80
             |                     
            
                24.80
             |                                 
            
                45,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2011
             | 
            
                -0.20 / -0.78%
             |             
            
                25.70
             |           
            
                26.00
             |               
            
                25.20
             |                           
            
                25.30
             | 
            
                25.30
             |                     
            
                25.30
             |                                 
            
                18,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2011
             | 
            
                +0.30 / +1.19%
             |             
            
                25.00
             |           
            
                26.00
             |               
            
                25.00
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                25.50
             |                                 
            
                37,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2011
             | 
            
                -1.00 / -3.82%
             |             
            
                26.60
             |           
            
                26.60
             |               
            
                25.20
             |                           
            
                25.20
             | 
            
                25.20
             |                     
            
                25.20
             |                                 
            
                71,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2011
             | 
            
                -0.80 / -2.96%
             |             
            
                27.00
             |           
            
                27.50
             |               
            
                26.10
             |                           
            
                26.20
             | 
            
                26.20
             |                     
            
                26.20
             |                                 
            
                126,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2011
             | 
            
                +1.50 / +5.88%
             |             
            
                25.80
             |           
            
                27.00
             |               
            
                25.80
             |                           
            
                27.00
             | 
            
                27.00
             |                     
            
                27.00
             |                                 
            
                107,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2011
             | 
            
                -0.40 / -1.54%
             |             
            
                26.10
             |           
            
                26.50
             |               
            
                24.90
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                25.50
             |                                 
            
                61,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2011
             | 
            
                +0.30 / +1.17%
             |             
            
                25.90
             |           
            
                26.20
             |               
            
                25.60
             |                           
            
                25.90
             | 
            
                25.90
             |                     
            
                25.90
             |                                 
            
                27,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2011
             | 
            
                +0.20 / +0.79%
             |             
            
                26.30
             |           
            
                26.30
             |               
            
                25.00
             |                           
            
                25.60
             | 
            
                25.60
             |                     
            
                25.60
             |                                 
            
                31,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2011
             | 
            
                -1.80 / -6.62%
             |             
            
                28.00
             |           
            
                28.00
             |               
            
                25.30
             |                           
            
                25.40
             | 
            
                25.40
             |                     
            
                25.40
             |                                 
            
                51,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2011
             | 
            
                +1.60 / +6.25%
             |             
            
                26.80
             |           
            
                27.20
             |               
            
                26.80
             |                           
            
                27.20
             | 
            
                27.20
             |                     
            
                27.20
             |                                 
            
                197,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2011
             | 
            
                +1.70 / +7.11%
             |             
            
                24.20
             |           
            
                25.60
             |               
            
                24.20
             |                           
            
                25.60
             | 
            
                25.60
             |                     
            
                25.60
             |                                 
            
                81,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2011
             | 
            
                -0.40 / -1.65%
             |             
            
                24.00
             |           
            
                24.40
             |               
            
                23.90
             |                           
            
                23.90
             | 
            
                23.90
             |                     
            
                23.90
             |                                 
            
                20,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                24.50
             |           
            
                25.00
             |               
            
                24.30
             |                           
            
                24.30
             | 
            
                24.30
             |                     
            
                24.30
             |                                 
            
                48,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2011
             | 
            
                +0.10 / +0.41%
             |             
            
                24.20
             |           
            
                25.00
             |               
            
                24.20
             |                           
            
                24.30
             | 
            
                24.30
             |                     
            
                24.30
             |                                 
            
                45,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2011
             | 
            
                +0.10 / +0.41%
             |             
            
                24.50
             |           
            
                24.50
             |               
            
                24.00
             |                           
            
                24.20
             | 
            
                24.20
             |                     
            
                24.20
             |                                 
            
                34,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/3/2011
             | 
            
                -0.90 / -3.60%
             |             
            
                24.50
             |           
            
                25.10
             |               
            
                24.00
             |                           
            
                24.10
             | 
            
                24.10
             |                     
            
                24.10
             |                                 
            
                53,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2011
             | 
            
                -1.10 / -4.21%
             |             
            
                25.60
             |           
            
                25.60
             |               
            
                24.80
             |                           
            
                25.00
             | 
            
                25.00
             |                     
            
                25.00
             |                                 
            
                126,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2011
             | 
            
                -0.40 / -1.51%
             |             
            
                26.80
             |           
            
                26.90
             |               
            
                26.00
             |                           
            
                26.10
             | 
            
                26.10
             |                     
            
                26.10
             |                                 
            
                26,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2011
             | 
            
                -0.50 / -1.85%
             |             
            
                26.80
             |           
            
                27.80
             |               
            
                26.50
             |                           
            
                26.50
             | 
            
                26.50
             |                     
            
                26.50
             |                                 
            
                46,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2011
             | 
            
                +1.10 / +4.25%
             |             
            
                26.30
             |           
            
                27.00
             |               
            
                26.00
             |                           
            
                27.00
             | 
            
                27.00
             |                     
            
                27.00
             |                                 
            
                51,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/24/2011
             | 
            
                -0.60 / -2.26%
             |             
            
                26.00
             |           
            
                26.30
             |               
            
                25.40
             |                           
            
                25.90
             | 
            
                25.90
             |                     
            
                25.90
             |                                 
            
                79,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2011
             | 
            
                +0.40 / +1.53%
             |             
            
                27.00
             |           
            
                27.40
             |               
            
                26.00
             |                           
            
                26.50
             | 
            
                26.50
             |                     
            
                26.50
             |                                 
            
                94,800
             |  
            
                 
             |                                                              
             
    
         
    
    
 |