| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 746 |
36.3%
|
| 1995 | 33 |
1.6%
|
|
| 1996 | 81 |
3.9%
|
|
| 1997 | 144 |
7%
|
|
| 1998 | 210 |
10.2%
|
|
| 1999 | 484 |
23.6%
|
|
| 2000 | 248 |
12.1%
|
|
| 4444 | marked on card | 70 |
3.4%
|
| 6666 | mother reported | 38 |
1.9%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 13931 |