| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | month and year - information complete | 5110 |
99.3%
|
| 5 | year - month imputed, age calculated | 0 |
0%
|
| 7 | month - date placed | 36 |
0.7%
|
| 8 | none - date placed | 0 |
0%
|
| 9 | from calendar | 0 |
0%
|
| Sysmiss | 34647 |