| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 51 |
7.2%
|
| 2 | no | 641 |
90.2%
|
| 3 | (dk) | 5 |
0.7%
|
| 4 | (ref) | 14 |
2%
|
| Sysmiss | 289 |