| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 167 |
8.1%
|
| 1995 | 60 |
2.9%
|
|
| 1996 | 121 |
5.9%
|
|
| 1997 | 182 |
8.9%
|
|
| 1998 | 336 |
16.4%
|
|
| 1999 | 720 |
35.1%
|
|
| 2000 | 390 |
19%
|
|
| 4444 | marked on card | 58 |
2.8%
|
| 6666 | mother reported | 20 |
1%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 13931 |