| 
                 
                    Closing price on 3/7/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    6.70 | 
                 
                
                    | High | 
                    6.90 | 
                 
                
                    | Low | 
                    6.70 | 
                     
                
                    | Volume | 
                    15,100 | 
                                 
                
                    | Split-adjusted Price | 
                    6.90 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD1 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/7/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.70
             |           
            
                6.90
             |               
            
                6.70
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                6.90
             |                                 
            
                15,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2012
             | 
            
                -0.10 / -1.43%
             |             
            
                7.40
             |           
            
                7.40
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                6.90
             |                                 
            
                6,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2012
             | 
            
                +0.40 / +6.06%
             |             
            
                6.80
             |           
            
                7.00
             |               
            
                6.80
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                7.00
             |                                 
            
                55,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2012
             | 
            
                +0.10 / +1.54%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.40
             |                           
            
                6.60
             | 
            
                6.50
             |                     
            
                6.60
             |                                 
            
                17,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2012
             | 
            
                -0.40 / -5.80%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                6.50
             |                                 
            
                2,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/29/2012
             | 
            
                +0.90 / +15.00%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                6.90
             |                     
            
                6.90
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2012
             | 
            
                -0.40 / -6.25%
             |             
            
                6.60
             |           
            
                6.70
             |               
            
                6.00
             |                           
            
                6.00
             | 
            
                6.00
             |                     
            
                6.00
             |                                 
            
                44,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2012
             | 
            
                +0.40 / +6.67%
             |             
            
                6.30
             |           
            
                6.40
             |               
            
                6.20
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                6.40
             |                                 
            
                18,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/24/2012
             | 
            
                +0.30 / +5.26%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                6.00
             |                           
            
                6.00
             | 
            
                6.00
             |                     
            
                6.00
             |                                 
            
                7,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2012
             | 
            
                +0.20 / +3.64%
             |             
            
                5.70
             |           
            
                5.70
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                6,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2012
             | 
            
                +0.40 / +7.84%
             |             
            
                5.10
             |           
            
                5.50
             |               
            
                5.10
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                5.50
             |                                 
            
                20,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2012
             | 
            
                +0.20 / +4.08%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                5.10
             |                                 
            
                29,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2012
             | 
            
                +0.30 / +6.52%
             |             
            
                4.90
             |           
            
                4.90
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                4.90
             |                                 
            
                600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/17/2012
             | 
            
                +0.30 / +6.98%
             |             
            
                4.60
             |           
            
                4.60
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                4.60
             |                                 
            
                5,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/16/2012
             | 
            
                -0.30 / -6.52%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                4.30
             |                                 
            
                23,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2012
             | 
            
                -0.50 / -9.80%
             |             
            
                4.60
             |           
            
                4.60
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                4.60
             |                                 
            
                17,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2012
             | 
            
                +0.30 / +6.25%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.70
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                5.10
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2012
             | 
            
                -0.40 / -7.69%
             |             
            
                4.80
             |           
            
                4.80
             |               
            
                4.80
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                4.80
             |                                 
            
                3,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/10/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                5.20
             |                                 
            
                400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2012
             | 
            
                +0.10 / +1.96%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                5.20
             |                                 
            
                4,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2012
             | 
            
                +0.30 / +6.25%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                5.10
             |                                 
            
                15,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2012
             | 
            
                -0.10 / -2.04%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                4.80
             |                                 
            
                10,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2012
             | 
            
                -0.10 / -2.00%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                4.70
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                4.90
             |                                 
            
                8,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/3/2012
             | 
            
                +0.30 / +6.38%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                5.00
             |                                 
            
                16,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2012
             | 
            
                +0.10 / +2.17%
             |             
            
                4.70
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                4.70
             |                                 
            
                4,200
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2012
             | 
            
                +0.30 / +6.98%
             |             
            
                4.40
             |           
            
                4.60
             |               
            
                4.30
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                4.60
             |                                 
            
                7,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2012
             | 
            
                +0.20 / +4.88%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                4.30
             |                                 
            
                10,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.10
             |           
            
                4.10
             |               
            
                4.00
             |                           
            
                4.10
             | 
            
                4.10
             |                     
            
                4.10
             |                                 
            
                11,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/20/2012
             | 
            
                -0.20 / -4.65%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.00
             |                           
            
                4.10
             | 
            
                4.30
             |                     
            
                4.10
             |                                 
            
                32,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2012
             | 
            
                +0.20 / +4.88%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                4.30
             |                                 
            
                400
             |  
            
                 
             |                                                              
             
    
         
    
    
 |