| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.7%
|
| 1 | Never | 42 |
35.6%
|
| 2 | Once a week | 62 |
52.5%
|
| 3 | Between 2 and 4 times a week | 9 |
7.6%
|
| 4 | Daily | 3 |
2.5%
|
| 5 | More than once a day | 0 |
0%
|
| Sysmiss | 240 |