| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 5 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    
| 2 | Every day | 29 | 
                                                                 
                                    
                                    16%
                                 
                                                             | 
                                                        
                    
| 3 | Several times a week | 110 | 
                                                                 
                                    
                                    60.8%
                                 
                                                             | 
                                                        
                    
| 4 | Several times a month | 37 | 
                                                                 
                                    
                                    20.4%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1438 |