| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 66 |
7.2%
|
| 2 | no | 839 |
91.9%
|
| 3 | (dk) | 5 |
0.5%
|
| 4 | (ref) | 3 |
0.3%
|
| Sysmiss | 87 |