| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. never | 1868 |
42.8%
|
| 2 | 2. once | 825 |
18.9%
|
| 3 | 3. two or three times | 1010 |
23.2%
|
| 4 | 4. more often | 535 |
12.3%
|
| 77 | 77. d/r | 0 |
0%
|
| 99 | 99. missing | 123 |
2.8%
|
| Sysmiss | 177 |