| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 55 |
7.2%
|
| 2 | no | 694 |
91.2%
|
| 3 | (dk) | 10 |
1.3%
|
| 4 | (ref) | 2 |
0.3%
|
| Sysmiss | 239 |