| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 954 |
46.4%
|
| 1995 | 39 |
1.9%
|
|
| 1996 | 67 |
3.3%
|
|
| 1997 | 115 |
5.6%
|
|
| 1998 | 167 |
8.1%
|
|
| 1999 | 377 |
18.4%
|
|
| 2000 | 181 |
8.8%
|
|
| 4444 | marked on card | 99 |
4.8%
|
| 6666 | mother reported | 55 |
2.7%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 13931 |