| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 1012 |
95.2%
|
| 44 | Marked on card - no date given | 18 |
1.7%
|
| 66 | Reported by mother | 25 |
2.4%
|
| 99 | Missing | 8 |
0.8%
|