| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1369 |
94.2%
|
| 1 | 1. once or twice | 64 |
4.4%
|
| 2 | 2. several times | 13 |
0.9%
|
| 3 | 3. most of the times | 8 |
0.6%
|
| Sysmiss | 109 |