| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
2.2%
|
| 1 | Never | 32 |
11.9%
|
| 2 | Once a week | 138 |
51.3%
|
| 3 | Between 2 and 4 times a week | 80 |
29.7%
|
| 4 | Daily | 5 |
1.9%
|
| 5 | More than once a day | 8 |
3%
|
| Sysmiss | 491 |