| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 804 |
97.9%
|
| 1 | 1. once or twice | 11 |
1.3%
|
| 2 | 2. several times | 0 |
0%
|
| 3 | 3. most of the time | 6 |
0.7%
|
| Sysmiss | 742 |