| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
5.1%
|
| 1 | Never | 24 |
40.7%
|
| 2 | Once a week | 19 |
32.2%
|
| 3 | Between 2 and 4 times a week | 9 |
15.3%
|
| 4 | Daily | 3 |
5.1%
|
| 5 | More than once a day | 1 |
1.7%
|
| Sysmiss | 181 |