| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1377 |
96.4%
|
| 1 | 1. once or twice | 32 |
2.2%
|
| 2 | 2. several times | 9 |
0.6%
|
| 3 | 3. most of the time | 11 |
0.8%
|
| Sysmiss | 134 |