| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
3.6%
|
| 1 | Never | 1 |
0.9%
|
| 2 | Once a week | 62 |
56.4%
|
| 3 | Between 2 and 4 times a week | 23 |
20.9%
|
| 4 | Daily | 19 |
17.3%
|
| 5 | More than once a day | 1 |
0.9%
|
| Sysmiss | 491 |