| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.7%
|
| 1 | Never | 3 |
2.6%
|
| 2 | Once a week | 43 |
36.8%
|
| 3 | Between 2 and 4 times a week | 45 |
38.5%
|
| 4 | Daily | 21 |
17.9%
|
| 5 | More than once a day | 3 |
2.6%
|
| Sysmiss | 312 |