| Value | Category | Cases | |
|---|---|---|---|
| 44 | No date is recorded (44) | 139 |
63.5%
|
| 66 | Date is not legible (66) | 19 |
8.7%
|
| 95 | Mother doesn't remember date | 61 |
27.9%
|
| Sysmiss | 418 |