| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 66 |
20.9%
|
| 1 | Never | 20 |
6.3%
|
| 2 | Once a week | 158 |
50%
|
| 3 | Between 2 and 4 times a week | 60 |
19%
|
| 4 | Daily | 12 |
3.8%
|
| 5 | More than once a day | 0 |
0%
|
| Sysmiss | 780 |