| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1391 |
95.7%
|
| 1 | 1. once or twice | 28 |
1.9%
|
| 2 | 2. several times | 17 |
1.2%
|
| 3 | 3. most of the times | 18 |
1.2%
|
| Sysmiss | 109 |