| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 115 |
23.9%
|
| 1995 | 28 |
5.8%
|
|
| 1996 | 93 |
19.3%
|
|
| 1997 | 93 |
19.3%
|
|
| 1998 | 63 |
13.1%
|
|
| 1999 | 28 |
5.8%
|
|
| 2000 | 15 |
3.1%
|
|
| 4444 | marked on card | 38 |
7.9%
|
| 6666 | mother reported | 8 |
1.7%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 15504 |