| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 0 | not given | 7 | 7 |
1.5%
|
| 1998 | 12 | 14 |
3.1%
|
|
| 1999 | 146 | 142 |
31.6%
|
|
| 2000 | 139 | 125 |
27.9%
|
|
| 2001 | 92 | 83 |
18.4%
|
|
| 2002 | 21 | 15 |
3.4%
|
|
| 2003 | 2 | 3 |
0.8%
|
|
| 4444 | marked on card | 27 | 24 |
5.3%
|
| 6666 | mother reported | 44 | 37 |
8.2%
|
| 9996 | not consistent with other card | 0 | 0 |
0%
|
| 9997 | inconsistent | 0 | 0 |
0%
|
| 9998 | dk | 0 | 0 |
0%
|
| 9999 | missing | 0 | 0 |
0%
|
| Sysmiss | 2803 | 2844 |