| 
                 
                    Closing price on 10/23/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    16.90 | 
                 
                
                    | High | 
                    17.30 | 
                 
                
                    | Low | 
                    16.10 | 
                     
                
                    | Volume | 
                    2,100 | 
                                 
                
                    | Split-adjusted Price | 
                    7.09 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
DSC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/23/2018
             | 
            
                +0.10 / +0.63%
             |             
            
                16.90
             |           
            
                17.30
             |               
            
                16.10
             |                           
            
                16.10
             | 
            
                16.20
             |                     
            
                7.09
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                10/22/2018
             | 
            
                -0.20 / -1.23%
             |             
            
                15.00
             |           
            
                17.70
             |               
            
                15.00
             |                           
            
                16.00
             | 
            
                15.71
             |                     
            
                7.05
             |                                 
            
                3,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/19/2018
             | 
            
                -1.30 / -7.30%
             |             
            
                18.60
             |           
            
                18.60
             |               
            
                16.00
             |                           
            
                16.50
             | 
            
                16.17
             |                     
            
                7.27
             |                                 
            
                7,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/18/2018
             | 
            
                -1.60 / -8.25%
             |             
            
                19.00
             |           
            
                19.00
             |               
            
                16.10
             |                           
            
                17.80
             | 
            
                16.96
             |                     
            
                7.84
             |                                 
            
                6,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/17/2018
             | 
            
                +0.90 / +4.86%
             |             
            
                19.90
             |           
            
                19.90
             |               
            
                18.20
             |                           
            
                19.40
             | 
            
                18.93
             |                     
            
                8.54
             |                                 
            
                2,400
             |            
            
                 
             |                                       
         
    
        
            | 
                10/16/2018
             | 
            
                -0.50 / -2.63%
             |             
            
                19.00
             |           
            
                19.00
             |               
            
                18.30
             |                           
            
                18.50
             | 
            
                18.76
             |                     
            
                8.15
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/15/2018
             | 
            
                +1.30 / +7.34%
             |             
            
                17.60
             |           
            
                19.00
             |               
            
                17.60
             |                           
            
                19.00
             | 
            
                18.38
             |                     
            
                8.37
             |                                 
            
                900
             |            
            
                 
             |                                       
         
    
        
            | 
                10/12/2018
             | 
            
                +1.60 / +8.74%
             |             
            
                17.30
             |           
            
                20.00
             |               
            
                17.10
             |                           
            
                19.90
             | 
            
                17.68
             |                     
            
                8.76
             |                                 
            
                1,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/11/2018
             | 
            
                -1.60 / -8.04%
             |             
            
                19.00
             |           
            
                19.00
             |               
            
                16.70
             |                           
            
                18.30
             | 
            
                17.36
             |                     
            
                8.06
             |                                 
            
                5,400
             |            
            
                 
             |                                       
         
    
        
            | 
                10/10/2018
             | 
            
                +1.70 / +9.34%
             |             
            
                18.00
             |           
            
                19.90
             |               
            
                18.00
             |                           
            
                19.90
             | 
            
                18.24
             |                     
            
                8.76
             |                                 
            
                3,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/9/2018
             | 
            
                -1.90 / -9.45%
             |             
            
                20.20
             |           
            
                20.20
             |               
            
                18.20
             |                           
            
                18.20
             | 
            
                19.32
             |                     
            
                8.01
             |                                 
            
                10,500
             |            
            
                 
             |                                       
         
    
        
            | 
                10/8/2018
             | 
            
                -0.30 / -1.47%
             |             
            
                20.20
             |           
            
                20.20
             |               
            
                20.10
             |                           
            
                20.10
             | 
            
                20.15
             |                     
            
                8.85
             |                                 
            
                2,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/5/2018
             | 
            
                0.00 / 0.00%
             |             
            
                21.00
             |           
            
                22.30
             |               
            
                19.20
             |                           
            
                21.00
             | 
            
                20.42
             |                     
            
                9.25
             |                                 
            
                16,800
             |            
            
                 
             |                                       
         
    
        
            | 
                10/4/2018
             | 
            
                -3.20 / -13.22%
             |             
            
                24.60
             |           
            
                24.60
             |               
            
                21.00
             |                           
            
                21.00
             | 
            
                22.48
             |                     
            
                9.25
             |                                 
            
                42,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/3/2018
             | 
            
                -2.80 / -10.37%
             |             
            
                26.00
             |           
            
                27.00
             |               
            
                24.20
             |                           
            
                24.20
             | 
            
                24.43
             |                     
            
                10.66
             |                                 
            
                5,200
             |            
            
                 
             |                                       
         
    
        
            | 
                10/2/2018
             | 
            
                +0.10 / +0.37%
             |             
            
                27.00
             |           
            
                27.00
             |               
            
                25.90
             |                           
            
                27.00
             | 
            
                26.50
             |                     
            
                11.89
             |                                 
            
                19,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/1/2018
             | 
            
                -0.20 / -0.74%
             |             
            
                27.20
             |           
            
                27.30
             |               
            
                26.90
             |                           
            
                26.90
             | 
            
                27.04
             |                     
            
                11.85
             |                                 
            
                16,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/28/2018
             | 
            
                -0.40 / -1.43%
             |             
            
                27.10
             |           
            
                27.80
             |               
            
                27.10
             |                           
            
                27.50
             | 
            
                27.15
             |                     
            
                12.11
             |                                 
            
                6,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/27/2018
             | 
            
                +0.90 / +3.33%
             |             
            
                27.00
             |           
            
                28.00
             |               
            
                25.80
             |                           
            
                27.90
             | 
            
                27.10
             |                     
            
                12.29
             |                                 
            
                12,400
             |            
            
                 
             |                                       
         
    
        
            | 
                9/26/2018
             | 
            
                -1.20 / -4.26%
             |             
            
                28.00
             |           
            
                28.00
             |               
            
                26.90
             |                           
            
                27.00
             | 
            
                27.03
             |                     
            
                11.89
             |                                 
            
                8,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/25/2018
             | 
            
                -0.80 / -2.76%
             |             
            
                29.00
             |           
            
                29.00
             |               
            
                27.00
             |                           
            
                28.20
             | 
            
                27.49
             |                     
            
                12.42
             |                                 
            
                7,500
             |            
            
                 
             |                                       
         
    
        
            | 
                9/24/2018
             | 
            
                +2.30 / +8.61%
             |             
            
                26.70
             |           
            
                29.00
             |               
            
                26.70
             |                           
            
                29.00
             | 
            
                28.17
             |                     
            
                12.77
             |                                 
            
                2,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/21/2018
             | 
            
                +0.30 / +1.08%
             |             
            
                23.50
             |           
            
                28.00
             |               
            
                22.80
             |                           
            
                28.00
             | 
            
                26.74
             |                     
            
                12.33
             |                                 
            
                4,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/20/2018
             | 
            
                +0.70 / +2.59%
             |             
            
                30.00
             |           
            
                30.80
             |               
            
                23.70
             |                           
            
                27.70
             | 
            
                26.15
             |                     
            
                12.20
             |                                 
            
                16,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/19/2018
             | 
            
                -2.30 / -7.85%
             |             
            
                27.20
             |           
            
                29.90
             |               
            
                27.00
             |                           
            
                27.00
             | 
            
                27.31
             |                     
            
                11.89
             |                                 
            
                5,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/18/2018
             | 
            
                -4.30 / -12.80%
             |             
            
                32.70
             |           
            
                32.70
             |               
            
                29.00
             |                           
            
                29.30
             | 
            
                30.51
             |                     
            
                12.90
             |                                 
            
                19,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/17/2018
             | 
            
                -2.20 / -6.15%
             |             
            
                37.90
             |           
            
                38.00
             |               
            
                33.20
             |                           
            
                33.60
             | 
            
                33.95
             |                     
            
                14.80
             |                                 
            
                17,900
             |            
            
                 
             |                                       
         
    
        
            | 
                9/14/2018
             | 
            
                +2.30 / +6.82%
             |             
            
                37.40
             |           
            
                37.90
             |               
            
                34.20
             |                           
            
                36.00
             | 
            
                35.80
             |                     
            
                15.85
             |                                 
            
                4,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/13/2018
             | 
            
                -4.20 / -11.08%
             |             
            
                34.00
             |           
            
                38.80
             |               
            
                33.30
             |                           
            
                33.70
             | 
            
                34.19
             |                     
            
                14.84
             |                                 
            
                24,400
             |            
            
                 
             |                                       
         
    
        
            | 
                9/12/2018
             | 
            
                -5.10 / -11.86%
             |             
            
                46.00
             |           
            
                46.00
             |               
            
                37.90
             |                           
            
                37.90
             | 
            
                38.80
             |                     
            
                16.69
             |                                 
            
                7,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |