| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 111 |
25.6%
|
| 2 | no | 310 |
71.6%
|
| 3 | (dk) | 11 |
2.5%
|
| 4 | (ref) | 1 |
0.2%
|
| Sysmiss | 567 |