| Value |
Category |
| 1 |
Month and year - information complete |
| 5 |
Year - month imputed, age calculated |
| 7 |
Month - date placed |
| 8 |
None - date placed |
| 9 |
From calendar |
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.