| Value | Category |
|---|---|
| 1 | Month and year |
| 2 | Month and year, year imputed |
| 3 | Year and age, month imputed |
| 4 | Year and age, year ignored |
| 5 | Year only, age and month imputed |
| 6 | Age only, year and month imputed |
| 7 | Month only, age and year imputed |
| 8 | None reported, all imputed |
| var_concept.title | Vocabulary |
|---|---|
| Core demographic Variables -- TOPICS | IPUMS |