| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. never | 1438 |
52.7%
|
| 2 | 2. once | 432 |
15.8%
|
| 3 | 3. two or three times | 556 |
20.4%
|
| 4 | 4. often | 304 |
11.1%
|
| Sysmiss | 1808 |