| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 5 |
11.1%
|
| 2 | no | 32 |
71.1%
|
| 3 | (dk) | 1 |
2.2%
|
| 4 | (ref) | 7 |
15.6%
|
| Sysmiss | 974 |