| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | month and year - information complete | 2660 |
99.2%
|
| 5 | year - month imputed, age calculated | 13 |
0.5%
|
| 7 | month - date placed | 1 |
0%
|
| 8 | none - date placed | 7 |
0.3%
|
| 9 | from calendar | 0 |
0%
|
| Sysmiss | 14406 |