| Value | Category | Cases | |
|---|---|---|---|
| 44 | No date is recorded (44) | 458 |
75.7%
|
| 66 | Date is not legible (66) | 76 |
12.6%
|
| 95 | Mother doesn't remember date | 71 |
11.7%
|
| Sysmiss | 32 |