| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
4.5%
|
| 1 | Never | 89 |
23.7%
|
| 2 | Once a week | 177 |
47.2%
|
| 3 | Between 2 and 4 times a week | 58 |
15.5%
|
| 4 | Daily | 28 |
7.5%
|
| 5 | More than once a day | 6 |
1.6%
|
| Sysmiss | 1071 |