| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    4.1%
                                 | 
| 1 | Never | 29 | 
                                    
                                    24%
                                 | 
| 2 | Once a week | 71 | 
                                    
                                    58.7%
                                 | 
| 3 | Between 2 and 4 times a week | 9 | 
                                    
                                    7.4%
                                 | 
| 4 | Daily | 7 | 
                                    
                                    5.8%
                                 | 
| 5 | More than once a day | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 834 |