| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 66 |
8.7%
|
| 2 | no | 677 |
89%
|
| 3 | (dk) | 16 |
2.1%
|
| 4 | (ref) | 2 |
0.3%
|
| Sysmiss | 239 |