| Value |
Category |
| 1 |
Full date known |
| 2 |
Day unknown |
| 3 |
Month unknown |
| 4 |
Day and month unknown |
| 5 |
Not known at all |
| 9 |
Missing |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.