| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 16 |
53.3%
|
| 2 | no | 13 |
43.3%
|
| 3 | (dk) | 1 |
3.3%
|
| 4 | (ref) | 0 |
0%
|
| Sysmiss | 972 |