| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 66 |
11.8%
|
| 2 | no | 467 |
83.5%
|
| 3 | (dk) | 22 |
3.9%
|
| 4 | (ref) | 4 |
0.7%
|
| Sysmiss | 441 |