| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 171 |
19.7%
|
| 2 | no | 690 |
79.7%
|
| 3 | (dk) | 4 |
0.5%
|
| 4 | (ref) | 1 |
0.1%
|
| Sysmiss | 135 |