| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 686 |
95.4%
|
| 44 | Marked on card - no date given | 7 |
1%
|
| 66 | Reported by mother | 21 |
2.9%
|
| 99 | Missing | 5 |
0.7%
|