| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 10 |
22.2%
|
| 2 | no | 23 |
51.1%
|
| 3 | (dk) | 6 |
13.3%
|
| 4 | (ref) | 6 |
13.3%
|
| Sysmiss | 974 |