| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.5%
|
| 1 | Never | 5 |
3.7%
|
| 2 | Once a week | 31 |
22.8%
|
| 3 | Between 2 and 4 times a week | 36 |
26.5%
|
| 4 | Daily | 52 |
38.2%
|
| 5 | More than once a day | 10 |
7.4%
|
| Sysmiss | 226 |