| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | not given | 1956 |
99.9%
|
| 2005 | 1 |
0.1%
|
|
| 4444 | marked on card | 0 |
0%
|
| 6666 | mother reported | 0 |
0%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 15130 |