Value | Category |
---|---|
0 | Not given |
1 | January |
2 | February |
3 | March |
4 | April |
5 | May |
6 | June |
7 | July |
8 | August |
9 | September |
10 | October |
11 | November |
12 | December |
44 | Marked on card |
66 | Mother reported |
97 | Inconsistent |
98 | Don't know/incomplete |