| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
3%
|
| 1 | Never | 31 |
5.4%
|
| 2 | Once a week | 286 |
50.1%
|
| 3 | Between 2 and 4 times a week | 171 |
29.9%
|
| 4 | Daily | 60 |
10.5%
|
| 5 | More than once a day | 6 |
1.1%
|
| Sysmiss | 1092 |