| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 990 |
65.2%
|
| 1 | 1. once or twice | 42 |
2.8%
|
| 2 | 2. several times | 52 |
3.4%
|
| 3 | 3. most of the times | 435 |
28.6%
|
| Sysmiss | 44 |