| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 968 |
97.5%
|
| 2 | no | 22 |
2.2%
|
| 3 | (dk) | 2 |
0.2%
|
| 4 | (ref) | 1 |
0.1%
|
| Sysmiss | 7 |