| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 1 | Never | 6 |
5%
|
| 2 | Once a week | 33 |
27.3%
|
| 3 | Between 2 and 4 times a week | 20 |
16.5%
|
| 4 | Daily | 52 |
43%
|
| 5 | More than once a day | 9 |
7.4%
|
| Sysmiss | 288 |