| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 40 |
22.1%
|
| 2 | no | 131 |
72.4%
|
| 3 | (dk) | 3 |
1.7%
|
| 4 | (ref) | 7 |
3.9%
|
| Sysmiss | 819 |