| 
                 
                    Closing price on 4/22/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.00 | 
                 
                
                    | High | 
                    14.00 | 
                 
                
                    | Low | 
                    13.30 | 
                     
                
                    | Volume | 
                    12,600 | 
                                 
                
                    | Split-adjusted Price | 
                    5.86 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DSC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/22/2019
             | 
            
                -2.20 / -14.19%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                13.30
             |                           
            
                13.30
             | 
            
                13.41
             |                     
            
                5.86
             |                                 
            
                12,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2019
             | 
            
                +0.50 / +3.33%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                6.83
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2019
             | 
            
                +0.70 / +4.90%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                14.40
             |                           
            
                15.00
             | 
            
                14.96
             |                     
            
                6.61
             |                                 
            
                1,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2019
             | 
            
                0.00 / 0.00%
             |             
            
                14.50
             |           
            
                15.00
             |               
            
                14.30
             |                           
            
                14.30
             | 
            
                14.38
             |                     
            
                6.30
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2019
             | 
            
                0.00 / 0.00%
             |             
            
                14.30
             |           
            
                14.30
             |               
            
                14.30
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                6.30
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2019
             | 
            
                +0.50 / +3.23%
             |             
            
                14.50
             |           
            
                16.00
             |               
            
                14.20
             |                           
            
                16.00
             | 
            
                14.27
             |                     
            
                7.05
             |                                 
            
                7,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2019
             | 
            
                -0.10 / -0.64%
             |             
            
                15.00
             |           
            
                15.50
             |               
            
                14.80
             |                           
            
                15.50
             | 
            
                15.09
             |                     
            
                6.83
             |                                 
            
                1,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2019
             | 
            
                -1.20 / -7.14%
             |             
            
                15.50
             |           
            
                16.00
             |               
            
                15.00
             |                           
            
                15.60
             | 
            
                15.46
             |                     
            
                6.87
             |                                 
            
                4,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2019
             | 
            
                +0.20 / +1.20%
             |             
            
                15.80
             |           
            
                16.80
             |               
            
                15.80
             |                           
            
                16.80
             | 
            
                16.30
             |                     
            
                7.40
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/8/2019
             | 
            
                +0.10 / +0.61%
             |             
            
                16.50
             |           
            
                17.60
             |               
            
                16.50
             |                           
            
                16.60
             | 
            
                16.90
             |                     
            
                7.31
             |                                 
            
                6,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2019
             | 
            
                +0.40 / +2.58%
             |             
            
                16.80
             |           
            
                16.80
             |               
            
                15.90
             |                           
            
                15.90
             | 
            
                16.47
             |                     
            
                7.00
             |                                 
            
                1,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2019
             | 
            
                0.00 / 0.00%
             |             
            
                17.50
             |           
            
                17.50
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.63
             |                     
            
                6.83
             |                                 
            
                2,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2019
             | 
            
                -1.00 / -6.06%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                6.83
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/2/2019
             | 
            
                +1.70 / +11.49%
             |             
            
                16.20
             |           
            
                17.00
             |               
            
                16.20
             |                           
            
                16.50
             | 
            
                16.55
             |                     
            
                7.27
             |                                 
            
                2,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2019
             | 
            
                -1.80 / -10.84%
             |             
            
                14.90
             |           
            
                15.00
             |               
            
                14.60
             |                           
            
                14.80
             | 
            
                14.83
             |                     
            
                6.52
             |                                 
            
                5,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2019
             | 
            
                -1.00 / -5.88%
             |             
            
                16.80
             |           
            
                16.80
             |               
            
                16.00
             |                           
            
                16.00
             | 
            
                16.59
             |                     
            
                7.05
             |                                 
            
                3,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2019
             | 
            
                +0.10 / +0.59%
             |             
            
                16.60
             |           
            
                17.00
             |               
            
                16.60
             |                           
            
                17.00
             | 
            
                16.77
             |                     
            
                7.49
             |                                 
            
                4,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2019
             | 
            
                -0.10 / -0.59%
             |             
            
                16.80
             |           
            
                16.90
             |               
            
                16.80
             |                           
            
                16.90
             | 
            
                16.82
             |                     
            
                7.44
             |                                 
            
                5,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2019
             | 
            
                +0.10 / +0.59%
             |             
            
                15.00
             |           
            
                17.20
             |               
            
                15.00
             |                           
            
                17.00
             | 
            
                15.95
             |                     
            
                7.49
             |                                 
            
                3,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2019
             | 
            
                -1.50 / -8.15%
             |             
            
                18.30
             |           
            
                18.30
             |               
            
                16.90
             |                           
            
                16.90
             | 
            
                17.14
             |                     
            
                7.44
             |                                 
            
                8,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2019
             | 
            
                -1.70 / -8.50%
             |             
            
                20.00
             |           
            
                20.00
             |               
            
                18.30
             |                           
            
                18.30
             | 
            
                18.44
             |                     
            
                8.06
             |                                 
            
                10,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2019
             | 
            
                -0.80 / -3.85%
             |             
            
                23.70
             |           
            
                23.80
             |               
            
                19.00
             |                           
            
                20.00
             | 
            
                21.51
             |                     
            
                8.81
             |                                 
            
                29,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2019
             | 
            
                +2.30 / +12.43%
             |             
            
                20.50
             |           
            
                20.80
             |               
            
                20.50
             |                           
            
                20.80
             | 
            
                20.72
             |                     
            
                9.16
             |                                 
            
                10,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2019
             | 
            
                +1.40 / +8.19%
             |             
            
                17.00
             |           
            
                18.50
             |               
            
                16.90
             |                           
            
                18.50
             | 
            
                18.09
             |                     
            
                8.15
             |                                 
            
                9,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2019
             | 
            
                +2.10 / +14.00%
             |             
            
                15.00
             |           
            
                17.10
             |               
            
                15.00
             |                           
            
                17.10
             | 
            
                16.07
             |                     
            
                7.53
             |                                 
            
                15,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2019
             | 
            
                +0.10 / +0.67%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                6.61
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2019
             | 
            
                -0.10 / -0.67%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                14.30
             |                           
            
                14.90
             | 
            
                14.80
             |                     
            
                6.56
             |                                 
            
                8,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2019
             | 
            
                +0.70 / +4.90%
             |             
            
                14.50
             |           
            
                15.00
             |               
            
                14.50
             |                           
            
                15.00
             | 
            
                14.92
             |                     
            
                6.61
             |                                 
            
                12,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2019
             | 
            
                0.00 / 0.00%
             |             
            
                14.40
             |           
            
                15.20
             |               
            
                14.20
             |                           
            
                14.30
             | 
            
                14.35
             |                     
            
                6.30
             |                                 
            
                35,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2019
             | 
            
                -0.70 / -4.67%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.30
             |                           
            
                14.30
             | 
            
                14.44
             |                     
            
                6.30
             |                                 
            
                35,200
             |  
            
                 
             |                                                              
             
    
         
    
    
 |