| 
                 
                    Closing price on 4/29/2014
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.30 | 
                 
                
                    | High | 
                    14.50 | 
                 
                
                    | Low | 
                    14.10 | 
                     
                
                    | Volume | 
                    63,505 | 
                                 
                
                    | Split-adjusted Price | 
                    10.12 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SD6 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/29/2014
             | 
            
                +0.20 / +1.40%
             |             
            
                14.30
             |           
            
                14.50
             |               
            
                14.10
             |                           
            
                14.50
             | 
            
                14.25
             |                     
            
                10.12
             |                                 
            
                63,505
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2014
             | 
            
                0.00 / 0.00%
             |             
            
                14.60
             |           
            
                14.70
             |               
            
                14.10
             |                           
            
                14.30
             | 
            
                14.51
             |                     
            
                9.98
             |                                 
            
                85,441
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2014
             | 
            
                +0.10 / +0.70%
             |             
            
                14.30
             |           
            
                14.50
             |               
            
                14.30
             |                           
            
                14.30
             | 
            
                14.38
             |                     
            
                9.98
             |                                 
            
                149,350
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2014
             | 
            
                +0.20 / +1.43%
             |             
            
                14.30
             |           
            
                14.30
             |               
            
                14.00
             |                           
            
                14.20
             | 
            
                14.03
             |                     
            
                9.91
             |                                 
            
                71,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2014
             | 
            
                -0.30 / -2.10%
             |             
            
                14.30
             |           
            
                14.30
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.12
             |                     
            
                9.77
             |                                 
            
                72,545
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2014
             | 
            
                +0.60 / +4.38%
             |             
            
                13.80
             |           
            
                14.30
             |               
            
                13.70
             |                           
            
                14.30
             | 
            
                13.97
             |                     
            
                9.98
             |                                 
            
                142,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2014
             | 
            
                -0.20 / -1.44%
             |             
            
                13.90
             |           
            
                14.00
             |               
            
                13.60
             |                           
            
                13.70
             | 
            
                13.80
             |                     
            
                9.56
             |                                 
            
                71,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2014
             | 
            
                -0.80 / -5.44%
             |             
            
                14.70
             |           
            
                14.70
             |               
            
                13.90
             |                           
            
                13.90
             | 
            
                14.15
             |                     
            
                9.70
             |                                 
            
                351,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2014
             | 
            
                +0.20 / +1.38%
             |             
            
                14.60
             |           
            
                14.90
             |               
            
                14.50
             |                           
            
                14.70
             | 
            
                14.73
             |                     
            
                10.26
             |                                 
            
                177,980
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2014
             | 
            
                -0.30 / -2.03%
             |             
            
                14.70
             |           
            
                14.80
             |               
            
                14.30
             |                           
            
                14.50
             | 
            
                14.52
             |                     
            
                10.12
             |                                 
            
                395,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/15/2014
             | 
            
                -0.80 / -5.13%
             |             
            
                15.60
             |           
            
                15.60
             |               
            
                14.80
             |                           
            
                14.80
             | 
            
                15.11
             |                     
            
                10.33
             |                                 
            
                340,076
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2014
             | 
            
                -0.10 / -0.64%
             |             
            
                15.90
             |           
            
                15.90
             |               
            
                15.50
             |                           
            
                15.60
             | 
            
                15.74
             |                     
            
                10.89
             |                                 
            
                287,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2014
             | 
            
                0.00 / 0.00%
             |             
            
                15.70
             |           
            
                15.80
             |               
            
                15.30
             |                           
            
                15.70
             | 
            
                15.58
             |                     
            
                10.96
             |                                 
            
                241,650
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2014
             | 
            
                +0.50 / +3.29%
             |             
            
                15.20
             |           
            
                15.90
             |               
            
                15.00
             |                           
            
                15.70
             | 
            
                15.57
             |                     
            
                10.96
             |                                 
            
                548,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2014
             | 
            
                -0.10 / -0.65%
             |             
            
                15.30
             |           
            
                15.40
             |               
            
                15.10
             |                           
            
                15.20
             | 
            
                15.26
             |                     
            
                10.61
             |                                 
            
                321,362
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2014
             | 
            
                -0.20 / -1.29%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                15.10
             |                           
            
                15.30
             | 
            
                15.27
             |                     
            
                10.68
             |                                 
            
                212,532
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2014
             | 
            
                +0.60 / +4.03%
             |             
            
                15.40
             |           
            
                16.30
             |               
            
                15.10
             |                           
            
                15.50
             | 
            
                15.68
             |                     
            
                10.82
             |                                 
            
                949,460
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2014
             | 
            
                +1.30 / +9.56%
             |             
            
                13.80
             |           
            
                14.90
             |               
            
                13.80
             |                           
            
                14.90
             | 
            
                14.41
             |                     
            
                10.40
             |                                 
            
                265,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2014
             | 
            
                +0.10 / +0.74%
             |             
            
                13.60
             |           
            
                13.70
             |               
            
                13.00
             |                           
            
                13.60
             | 
            
                13.42
             |                     
            
                9.49
             |                                 
            
                392,774
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2014
             | 
            
                -0.80 / -5.59%
             |             
            
                14.30
             |           
            
                14.30
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.91
             |                     
            
                9.42
             |                                 
            
                291,676
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2014
             | 
            
                -0.40 / -2.72%
             |             
            
                14.50
             |           
            
                14.60
             |               
            
                14.30
             |                           
            
                14.30
             | 
            
                14.42
             |                     
            
                9.98
             |                                 
            
                158,170
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2014
             | 
            
                0.00 / 0.00%
             |             
            
                14.60
             |           
            
                14.90
             |               
            
                14.60
             |                           
            
                14.70
             | 
            
                14.71
             |                     
            
                10.26
             |                                 
            
                171,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2014
             | 
            
                0.00 / 0.00%
             |             
            
                14.00
             |           
            
                14.70
             |               
            
                14.00
             |                           
            
                14.70
             | 
            
                14.44
             |                     
            
                10.26
             |                                 
            
                301,132
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2014
             | 
            
                -0.40 / -2.65%
             |             
            
                15.10
             |           
            
                15.20
             |               
            
                14.30
             |                           
            
                14.70
             | 
            
                14.87
             |                     
            
                10.26
             |                                 
            
                330,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/25/2014
             | 
            
                -0.50 / -3.21%
             |             
            
                15.70
             |           
            
                15.70
             |               
            
                15.00
             |                           
            
                15.10
             | 
            
                15.28
             |                     
            
                10.54
             |                                 
            
                301,521
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2014
             | 
            
                +0.30 / +1.96%
             |             
            
                15.30
             |           
            
                15.80
             |               
            
                15.00
             |                           
            
                15.60
             | 
            
                15.46
             |                     
            
                10.89
             |                                 
            
                712,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2014
             | 
            
                +0.20 / +1.32%
             |             
            
                15.10
             |           
            
                15.30
             |               
            
                15.00
             |                           
            
                15.30
             | 
            
                15.15
             |                     
            
                10.68
             |                                 
            
                291,926
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2014
             | 
            
                -0.20 / -1.31%
             |             
            
                15.40
             |           
            
                15.50
             |               
            
                14.90
             |                           
            
                15.10
             | 
            
                15.19
             |                     
            
                10.54
             |                                 
            
                259,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2014
             | 
            
                +0.50 / +3.38%
             |             
            
                14.60
             |           
            
                15.60
             |               
            
                14.60
             |                           
            
                15.30
             | 
            
                15.25
             |                     
            
                10.68
             |                                 
            
                463,720
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2014
             | 
            
                -0.10 / -0.67%
             |             
            
                15.10
             |           
            
                15.10
             |               
            
                14.80
             |                           
            
                14.80
             | 
            
                14.89
             |                     
            
                10.33
             |                                 
            
                338,730
             |  
            
                 
             |                                                              
             
    
         
    
    
 |