| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 153 |
28.4%
|
| 2 | no | 357 |
66.2%
|
| 3 | (dk) | 11 |
2%
|
| 4 | (ref) | 18 |
3.3%
|
| Sysmiss | 461 |