| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 31 |
8%
|
| 1 | Never | 13 |
3.3%
|
| 2 | Once a week | 137 |
35.2%
|
| 3 | Between 2 and 4 times a week | 110 |
28.3%
|
| 4 | Daily | 92 |
23.7%
|
| 5 | More than once a day | 6 |
1.5%
|
| Sysmiss | 980 |