| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 45 |
7.9%
|
| 2 | no | 505 |
88.3%
|
| 3 | (dk) | 8 |
1.4%
|
| 4 | (ref) | 14 |
2.4%
|
| Sysmiss | 428 |