| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 29 |
5.2%
|
| 2 | no | 526 |
93.4%
|
| 3 | (dk) | 7 |
1.2%
|
| 4 | (ref) | 1 |
0.2%
|
| Sysmiss | 437 |