| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3426 |
90.6%
|
| 2 | Both | 43 |
1.1%
|
| 3 | Father only | 189 |
5%
|
| 4 | Mother only | 23 |
0.6%
|
| 5 | I don't know | 99 |
2.6%
|
| Sysmiss | 4 |