| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 1169 |
97.9%
|
| 44 | Marked on card - no date given | 9 |
0.8%
|
| 66 | Reported by mother | 6 |
0.5%
|
| 99 | Missing | 10 |
0.8%
|