| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 972 |
66.9%
|
| 1 | 1. once or twice | 64 |
4.4%
|
| 2 | 2. several times | 82 |
5.6%
|
| 3 | 3. most of the times | 336 |
23.1%
|
| Sysmiss | 109 |