| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 55 |
9.4%
|
| 2 | no | 525 |
89.3%
|
| 3 | (dk) | 4 |
0.7%
|
| 4 | (ref) | 4 |
0.7%
|
| Sysmiss | 412 |