| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. never | 1671 |
38.3%
|
| 2 | 2. once | 1344 |
30.8%
|
| 3 | 3. two or three times | 863 |
19.8%
|
| 4 | 4. more often | 383 |
8.8%
|
| 77 | 77. d/r | 0 |
0%
|
| 99 | 99. missing | 100 |
2.3%
|
| Sysmiss | 177 |