| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 795 |
42%
|
| 44 | Marked on card - no date given | 55 |
2.9%
|
| 66 | Reported by mother | 1029 |
54.4%
|
| 99 | Missing | 12 |
0.6%
|