| Value |
Category |
| 1 |
Month and year - information complete |
| 2 |
Month and age - year imputed |
| 3 |
Year and age - month imputed |
| 4 |
Year and age - year ignored |
| 5 |
Year - age/month imputed |
| 6 |
Age - year/month imputed |
| 7 |
Month - age/year imputed |
| 8 |
None - all imputed |
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.
