| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
4.3%
|
| 1 | Never | 31 |
6.7%
|
| 2 | Once a week | 148 |
31.8%
|
| 3 | Between 2 and 4 times a week | 124 |
26.6%
|
| 4 | Daily | 133 |
28.5%
|
| 5 | More than once a day | 10 |
2.1%
|
| Sysmiss | 871 |