| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 4 | 
                                    
                                    1.7%
                                 | 
| 2 | Once a year | 23 | 
                                    
                                    9.5%
                                 | 
| 3 | Once a month | 0 | 
                                    
                                    0%
                                 | 
| 4 | Once a week | 158 | 
                                    
                                    65.3%
                                 | 
| 5 | Almost every day | 57 | 
                                    
                                    23.6%
                                 | 
| Sysmiss | 9 |