| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 33 |
3.4%
|
| 2 | no | 850 |
87.2%
|
| 3 | (dk) | 90 |
9.2%
|
| 4 | (ref) | 2 |
0.2%
|
| Sysmiss | 26 |