| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 49 |
5.7%
|
| 2 | no | 809 |
93.4%
|
| 3 | (dk) | 6 |
0.7%
|
| 4 | (ref) | 2 |
0.2%
|
| Sysmiss | 135 |