| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
4%
|
| 1 | Never | 8 |
6.4%
|
| 2 | Once a week | 35 |
28%
|
| 3 | Between 2 and 4 times a week | 16 |
12.8%
|
| 4 | Daily | 50 |
40%
|
| 5 | More than once a day | 11 |
8.8%
|
| Sysmiss | 235 |