| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 9 |
39.1%
|
| 2 | no | 12 |
52.2%
|
| 3 | (dk) | 1 |
4.3%
|
| 4 | (ref) | 1 |
4.3%
|
| Sysmiss | 978 |