| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1401 |
98%
|
| 1 | 1. once or twice | 20 |
1.4%
|
| 2 | 2. several times | 4 |
0.3%
|
| 3 | 3. most of the time | 4 |
0.3%
|
| Sysmiss | 134 |