| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
1.1%
|
| 1 | Never | 21 |
4.5%
|
| 2 | Once a week | 131 |
28.1%
|
| 3 | Between 2 and 4 times a week | 134 |
28.8%
|
| 4 | Daily | 153 |
32.8%
|
| 5 | More than once a day | 22 |
4.7%
|
| Sysmiss | 871 |