| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.7%
|
| 1 | Never | 10 |
8.5%
|
| 2 | Once a week | 38 |
32.2%
|
| 3 | Between 2 and 4 times a week | 17 |
14.4%
|
| 4 | Daily | 49 |
41.5%
|
| 5 | More than once a day | 2 |
1.7%
|
| Sysmiss | 240 |