| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 967 |
97.3%
|
| 2 | no | 22 |
2.2%
|
| 3 | (dk) | 3 |
0.3%
|
| 4 | (ref) | 2 |
0.2%
|
| Sysmiss | 6 |