| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 10 |
18.5%
|
| 2 | no | 41 |
75.9%
|
| 3 | (dk) | 1 |
1.9%
|
| 4 | (ref) | 2 |
3.7%
|
| Sysmiss | 948 |