| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1382 |
96.7%
|
| 1 | 1. once or twice | 38 |
2.7%
|
| 2 | 2. several times | 7 |
0.5%
|
| 3 | 3. most of the time | 2 |
0.1%
|
| Sysmiss | 134 |