| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 55 |
13.7%
|
| 2 | no | 329 |
81.8%
|
| 3 | (dk) | 15 |
3.7%
|
| 4 | (ref) | 3 |
0.7%
|
| Sysmiss | 598 |