| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1371 |
95.9%
|
| 1 | 1. once or twice | 47 |
3.3%
|
| 2 | 2. several times | 3 |
0.2%
|
| 3 | 3. most of the time | 8 |
0.6%
|
| Sysmiss | 134 |