| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 75 |
12.8%
|
| 2 | no | 498 |
84.7%
|
| 3 | (dk) | 12 |
2%
|
| 4 | (ref) | 3 |
0.5%
|
| Sysmiss | 412 |