| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
4.2%
|
| 1 | Never | 29 |
40.3%
|
| 2 | Once a week | 31 |
43.1%
|
| 3 | Between 2 and 4 times a week | 7 |
9.7%
|
| 4 | Daily | 2 |
2.8%
|
| 5 | More than once a day | 0 |
0%
|
| Sysmiss | 293 |