| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3510 |
84.7%
|
| 2 | Both | 52 |
1.3%
|
| 3 | Father only | 530 |
12.8%
|
| 4 | Mother only | 15 |
0.4%
|
| 5 | I don't know | 39 |
0.9%
|
| Sysmiss | 131 |