| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
6.4%
|
| 1 | Never | 62 |
23.4%
|
| 2 | Once a week | 119 |
44.9%
|
| 3 | Between 2 and 4 times a week | 52 |
19.6%
|
| 4 | Daily | 13 |
4.9%
|
| 5 | More than once a day | 2 |
0.8%
|
| Sysmiss | 507 |