| Value | Category | Cases | |
|---|---|---|---|
| 44 | No date is recorded (44) | 163 |
59.7%
|
| 66 | Date is not legible (66) | 35 |
12.8%
|
| 95 | Mother doesn't remember date | 75 |
27.5%
|
| Sysmiss | 364 |