| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 38 |
10.2%
|
| 2 | no | 334 |
89.3%
|
| 3 | (dk) | 1 |
0.3%
|
| 4 | (ref) | 1 |
0.3%
|
| Sysmiss | 626 |