| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
3.7%
|
| 1 | Never | 21 |
19.6%
|
| 2 | Once a week | 54 |
50.5%
|
| 3 | Between 2 and 4 times a week | 14 |
13.1%
|
| 4 | Daily | 14 |
13.1%
|
| 5 | More than once a day | 0 |
0%
|
| Sysmiss | 425 |