| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 46 |
8.1%
|
| 2 | no | 513 |
90.6%
|
| 3 | (dk) | 6 |
1.1%
|
| 4 | (ref) | 1 |
0.2%
|
| Sysmiss | 434 |