| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.5%
|
| 1 | Never | 2 |
3.1%
|
| 2 | Once a week | 15 |
23.1%
|
| 3 | Between 2 and 4 times a week | 11 |
16.9%
|
| 4 | Daily | 31 |
47.7%
|
| 5 | More than once a day | 5 |
7.7%
|
| Sysmiss | 177 |