| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. once | 1 |
33.3%
|
| 2 | 2. more than once | 1 |
33.3%
|
| 3 | 3. never | 1 |
33.3%
|
| 9 | 9. don't know | 0 |
0%
|
| Sysmiss | 96 |