| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 857 |
41.7%
|
| 1995 | 12 |
0.6%
|
|
| 1996 | 60 |
2.9%
|
|
| 1997 | 122 |
5.9%
|
|
| 1998 | 179 |
8.7%
|
|
| 1999 | 380 |
18.5%
|
|
| 2000 | 360 |
17.5%
|
|
| 4444 | marked on card | 45 |
2.2%
|
| 6666 | mother reported | 39 |
1.9%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 13931 |