| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. never | 1046 |
34.3%
|
| 2 | 2. once | 558 |
18.3%
|
| 3 | 3. two or three times | 779 |
25.5%
|
| 4 | 4. often | 666 |
21.8%
|
| Sysmiss | 1489 |