| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. never | 3030 |
69.5%
|
| 2 | 2. once | 528 |
12.1%
|
| 3 | 3. two or three times | 419 |
9.6%
|
| 4 | 4. more often | 256 |
5.9%
|
| 77 | 77. d/r | 0 |
0%
|
| 99 | 99. missing | 128 |
2.9%
|
| Sysmiss | 177 |