| 
                 
                    Closing price on 7/23/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    8.80 | 
                 
                
                    | High | 
                    9.00 | 
                 
                
                    | Low | 
                    8.80 | 
                     
                
                    | Volume | 
                    76,770 | 
                                 
                
                    | Split-adjusted Price | 
                    5.57 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD6 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/23/2013
             | 
            
                -1.40 / -13.59%
             |             
            
                8.80
             |           
            
                9.00
             |               
            
                8.80
             |                           
            
                8.90
             | 
            
                8.86
             |                     
            
                5.57
             |                                 
            
                76,770
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2013
             | 
            
                0.00 / 0.00%
             |             
            
                10.30
             |           
            
                10.40
             |               
            
                10.20
             |                           
            
                10.30
             | 
            
                10.32
             |                     
            
                5.51
             |                                 
            
                164,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2013
             | 
            
                0.00 / 0.00%
             |             
            
                10.30
             |           
            
                10.40
             |               
            
                10.20
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                5.51
             |                                 
            
                122,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2013
             | 
            
                -0.10 / -0.96%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                10.30
             |                           
            
                10.30
             | 
            
                10.33
             |                     
            
                5.51
             |                                 
            
                80,301
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/17/2013
             | 
            
                0.00 / 0.00%
             |             
            
                10.30
             |           
            
                10.40
             |               
            
                10.30
             |                           
            
                10.40
             | 
            
                10.36
             |                     
            
                5.57
             |                                 
            
                103,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/16/2013
             | 
            
                +0.10 / +0.97%
             |             
            
                10.20
             |           
            
                10.40
             |               
            
                10.20
             |                           
            
                10.40
             | 
            
                10.33
             |                     
            
                5.57
             |                                 
            
                83,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2013
             | 
            
                0.00 / 0.00%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.25
             |                     
            
                5.51
             |                                 
            
                64,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2013
             | 
            
                +0.10 / +0.98%
             |             
            
                10.20
             |           
            
                10.40
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.25
             |                     
            
                5.51
             |                                 
            
                78,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2013
             | 
            
                0.00 / 0.00%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                10.00
             |                           
            
                10.20
             | 
            
                10.10
             |                     
            
                5.46
             |                                 
            
                101,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/10/2013
             | 
            
                -0.10 / -0.97%
             |             
            
                10.10
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.22
             |                     
            
                5.46
             |                                 
            
                143,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/9/2013
             | 
            
                +0.10 / +0.98%
             |             
            
                10.20
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.20
             |                     
            
                5.51
             |                                 
            
                97,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2013
             | 
            
                -0.10 / -0.97%
             |             
            
                10.20
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.16
             |                     
            
                5.46
             |                                 
            
                73,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2013
             | 
            
                -0.30 / -2.83%
             |             
            
                10.90
             |           
            
                11.00
             |               
            
                10.30
             |                           
            
                10.30
             | 
            
                10.49
             |                     
            
                5.51
             |                                 
            
                169,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2013
             | 
            
                +0.90 / +9.28%
             |             
            
                9.90
             |           
            
                10.60
             |               
            
                9.90
             |                           
            
                10.60
             | 
            
                10.53
             |                     
            
                5.67
             |                                 
            
                373,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/3/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.70
             |           
            
                9.70
             |               
            
                9.50
             |                           
            
                9.70
             | 
            
                9.59
             |                     
            
                5.19
             |                                 
            
                164,450
             |            
            
                 
             |                                       
         
    
        
            | 
                7/2/2013
             | 
            
                +0.10 / +1.04%
             |             
            
                9.60
             |           
            
                9.80
             |               
            
                9.60
             |                           
            
                9.70
             | 
            
                9.65
             |                     
            
                5.19
             |                                 
            
                91,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2013
             | 
            
                -0.10 / -1.03%
             |             
            
                9.60
             |           
            
                9.70
             |               
            
                9.40
             |                           
            
                9.60
             | 
            
                9.57
             |                     
            
                5.14
             |                                 
            
                83,950
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2013
             | 
            
                -0.20 / -2.02%
             |             
            
                9.90
             |           
            
                10.10
             |               
            
                9.60
             |                           
            
                9.70
             | 
            
                9.89
             |                     
            
                5.19
             |                                 
            
                101,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2013
             | 
            
                +0.30 / +3.13%
             |             
            
                9.70
             |           
            
                9.90
             |               
            
                9.70
             |                           
            
                9.90
             | 
            
                9.78
             |                     
            
                5.30
             |                                 
            
                43,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/26/2013
             | 
            
                -0.10 / -1.03%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.30
             |                           
            
                9.60
             | 
            
                9.52
             |                     
            
                5.14
             |                                 
            
                144,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/25/2013
             | 
            
                -0.50 / -4.90%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                9.30
             |                           
            
                9.70
             | 
            
                9.65
             |                     
            
                5.19
             |                                 
            
                367,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2013
             | 
            
                -0.10 / -0.97%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.00
             |                           
            
                10.20
             | 
            
                10.21
             |                     
            
                5.46
             |                                 
            
                296,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2013
             | 
            
                +0.20 / +1.98%
             |             
            
                10.00
             |           
            
                10.50
             |               
            
                10.00
             |                           
            
                10.30
             | 
            
                10.33
             |                     
            
                5.51
             |                                 
            
                429,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2013
             | 
            
                +0.30 / +3.06%
             |             
            
                9.70
             |           
            
                10.30
             |               
            
                9.70
             |                           
            
                10.10
             | 
            
                10.05
             |                     
            
                5.41
             |                                 
            
                341,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/19/2013
             | 
            
                -0.50 / -4.85%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.95
             |                     
            
                5.24
             |                                 
            
                201,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/18/2013
             | 
            
                +0.10 / +0.98%
             |             
            
                10.20
             |           
            
                10.30
             |               
            
                9.70
             |                           
            
                10.30
             | 
            
                9.87
             |                     
            
                5.51
             |                                 
            
                133,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2013
             | 
            
                0.00 / 0.00%
             |             
            
                10.50
             |           
            
                11.00
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.51
             |                     
            
                5.46
             |                                 
            
                315,488
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2013
             | 
            
                +0.90 / +9.68%
             |             
            
                9.40
             |           
            
                10.20
             |               
            
                9.40
             |                           
            
                10.20
             | 
            
                10.10
             |                     
            
                5.46
             |                                 
            
                894,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2013
             | 
            
                +0.20 / +2.20%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.31
             |                     
            
                4.98
             |                                 
            
                165,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/12/2013
             | 
            
                -0.10 / -1.09%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                9.10
             |                           
            
                9.10
             | 
            
                9.13
             |                     
            
                4.87
             |                                 
            
                86,112
             |  
            
                 
             |                                                              
             
    
         
    
    
 |