| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 30 |
7.7%
|
| 1 | Never | 9 |
2.3%
|
| 2 | Once a week | 145 |
37.3%
|
| 3 | Between 2 and 4 times a week | 116 |
29.8%
|
| 4 | Daily | 77 |
19.8%
|
| 5 | More than once a day | 12 |
3.1%
|
| Sysmiss | 980 |