| 
                 
                    Closing price on 6/24/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    9.20 | 
                 
                
                    | High | 
                    9.20 | 
                 
                
                    | Low | 
                    9.00 | 
                     
                
                    | Volume | 
                    4,500 | 
                                 
                
                    | Split-adjusted Price | 
                    5.13 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DSC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/24/2019
             | 
            
                -0.30 / -3.19%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                9.00
             |                           
            
                9.10
             | 
            
                9.06
             |                     
            
                5.13
             |                                 
            
                4,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2019
             | 
            
                +0.10 / +1.08%
             |             
            
                9.20
             |           
            
                9.50
             |               
            
                9.20
             |                           
            
                9.40
             | 
            
                9.38
             |                     
            
                5.30
             |                                 
            
                5,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/20/2019
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.24
             |                                 
            
                400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/19/2019
             | 
            
                +0.70 / +8.14%
             |             
            
                8.80
             |           
            
                9.50
             |               
            
                8.60
             |                           
            
                9.30
             | 
            
                8.94
             |                     
            
                5.24
             |                                 
            
                10,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2019
             | 
            
                -0.30 / -3.37%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.77
             |                     
            
                4.85
             |                                 
            
                14,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/17/2019
             | 
            
                -0.10 / -1.11%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.94
             |                     
            
                5.02
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2019
             | 
            
                -0.10 / -1.11%
             |             
            
                8.90
             |           
            
                9.00
             |               
            
                8.70
             |                           
            
                8.90
             | 
            
                8.95
             |                     
            
                5.02
             |                                 
            
                9,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2019
             | 
            
                +0.20 / +2.27%
             |             
            
                9.10
             |           
            
                9.10
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.03
             |                     
            
                5.07
             |                                 
            
                3,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/12/2019
             | 
            
                -0.20 / -2.22%
             |             
            
                9.00
             |           
            
                9.10
             |               
            
                8.80
             |                           
            
                8.80
             | 
            
                8.97
             |                     
            
                4.96
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2019
             | 
            
                -0.10 / -1.10%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                8.40
             |                           
            
                9.00
             | 
            
                8.94
             |                     
            
                5.07
             |                                 
            
                20,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/10/2019
             | 
            
                -0.40 / -4.21%
             |             
            
                9.40
             |           
            
                9.60
             |               
            
                9.10
             |                           
            
                9.10
             | 
            
                9.32
             |                     
            
                5.13
             |                                 
            
                22,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2019
             | 
            
                -0.40 / -4.08%
             |             
            
                9.80
             |           
            
                9.80
             |               
            
                9.20
             |                           
            
                9.40
             | 
            
                9.53
             |                     
            
                5.30
             |                                 
            
                17,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2019
             | 
            
                +0.20 / +2.08%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.83
             |                     
            
                5.53
             |                                 
            
                20,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2019
             | 
            
                -0.40 / -4.00%
             |             
            
                10.00
             |           
            
                10.20
             |               
            
                9.60
             |                           
            
                9.60
             | 
            
                10.00
             |                     
            
                5.41
             |                                 
            
                14,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2019
             | 
            
                -0.90 / -8.26%
             |             
            
                10.80
             |           
            
                10.80
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.09
             |                     
            
                5.64
             |                                 
            
                24,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2019
             | 
            
                +0.20 / +1.87%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                10.70
             |                           
            
                10.90
             | 
            
                10.89
             |                     
            
                6.15
             |                                 
            
                8,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2019
             | 
            
                0.00 / 0.00%
             |             
            
                13.50
             |           
            
                14.00
             |               
            
                13.50
             |                           
            
                13.70
             | 
            
                13.69
             |                     
            
                6.03
             |                                 
            
                50,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2019
             | 
            
                -0.90 / -6.16%
             |             
            
                14.40
             |           
            
                14.40
             |               
            
                13.50
             |                           
            
                13.70
             | 
            
                13.71
             |                     
            
                6.03
             |                                 
            
                27,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2019
             | 
            
                -0.10 / -0.68%
             |             
            
                14.90
             |           
            
                14.90
             |               
            
                14.50
             |                           
            
                14.60
             | 
            
                14.59
             |                     
            
                6.43
             |                                 
            
                12,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2019
             | 
            
                +0.20 / +1.38%
             |             
            
                14.50
             |           
            
                15.00
             |               
            
                13.90
             |                           
            
                14.70
             | 
            
                14.50
             |                     
            
                6.47
             |                                 
            
                80,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2019
             | 
            
                +1.50 / +11.54%
             |             
            
                13.10
             |           
            
                14.80
             |               
            
                13.00
             |                           
            
                14.50
             | 
            
                13.75
             |                     
            
                6.39
             |                                 
            
                115,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2019
             | 
            
                0.00 / 0.00%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                13.00
             |                           
            
                13.20
             | 
            
                13.04
             |                     
            
                5.81
             |                                 
            
                8,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2019
             | 
            
                +0.20 / +1.54%
             |             
            
                13.10
             |           
            
                13.50
             |               
            
                13.10
             |                           
            
                13.20
             | 
            
                13.25
             |                     
            
                5.81
             |                                 
            
                12,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2019
             | 
            
                -0.20 / -1.52%
             |             
            
                13.20
             |           
            
                13.50
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.10
             |                     
            
                5.72
             |                                 
            
                41,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2019
             | 
            
                -0.70 / -5.04%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                13.20
             |                           
            
                13.20
             | 
            
                13.34
             |                     
            
                5.81
             |                                 
            
                16,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2019
             | 
            
                +0.80 / +6.11%
             |             
            
                13.30
             |           
            
                13.90
             |               
            
                13.10
             |                           
            
                13.90
             | 
            
                13.21
             |                     
            
                6.12
             |                                 
            
                16,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2019
             | 
            
                +0.60 / +4.48%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                13.00
             |                           
            
                14.00
             | 
            
                13.06
             |                     
            
                6.17
             |                                 
            
                62,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2019
             | 
            
                +0.40 / +3.08%
             |             
            
                13.00
             |           
            
                13.40
             |               
            
                13.00
             |                           
            
                13.40
             | 
            
                13.00
             |                     
            
                5.90
             |                                 
            
                55,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2019
             | 
            
                0.00 / 0.00%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                5.72
             |                                 
            
                15,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2019
             | 
            
                -0.40 / -2.99%
             |             
            
                13.40
             |           
            
                13.40
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.01
             |                     
            
                5.72
             |                                 
            
                5,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |