| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 93 |
4.5%
|
| 1995 | 67 |
3.3%
|
|
| 1996 | 123 |
6%
|
|
| 1997 | 193 |
9.4%
|
|
| 1998 | 351 |
17.1%
|
|
| 1999 | 729 |
35.5%
|
|
| 2000 | 394 |
19.2%
|
|
| 4444 | marked on card | 76 |
3.7%
|
| 6666 | mother reported | 27 |
1.3%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 1 |
0%
|
| Sysmiss | 13931 |