| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 5 |
14.3%
|
| 1 | 1 |
2.9%
|
|
| 12 | 1 |
2.9%
|
|
| 14 | 1 |
2.9%
|
|
| 15 | 2 |
5.7%
|
|
| 17 | 2 |
5.7%
|
|
| 18 | 2 |
5.7%
|
|
| 23 | 2 |
5.7%
|
|
| 29 | 1 |
2.9%
|
|
| 30 | 4 |
11.4%
|
|
| 44 | Marked on card - no date | 12 |
34.3%
|
| 66 | Reported by mother | 2 |
5.7%
|
| 97 | Missing | 0 |
0%
|
| Sysmiss | 1855 |