| Value | Category |
|---|---|
| 00 | Less than 1 year |
| 01 | 1 year |
| 02 | 2 years |
| 03 | 3 years |
| 04 | 4 years |
| 05 | 5 years |
| 06 | 6 years |
| 07 | 7 years |
| 08 | 8 years |
| 09 | 9 years |
| 10 | 10 years |
| 11 | 11 years |
| 12 | 12 years |
| 13 | 13 years |
| 14 | 14 years |
| 15 | 15 years |
| 16 | 16 years |
| 17 | 17 years |
| 18 | 18 years |
| 19 | 19 years |
| 20 | 20 years |
| 21 | 21 years |
| 22 | 22 years |
| 23 | 23 years |
| 24 | 24 years |
| 25 | 25 years |
| 26 | 26 years |
| 27 | 27 years |
| 28 | 28 years |
| 29 | 29 years |
| 30 | 30 years |
| 31 | 31 years |
| 32 | 32 years |
| 33 | 33 years |
| 34 | 34 years |
| 35 | 35 years |
| 36 | 36 years |
| 37 | 37 years |
| 38 | 38 years |
| 39 | 39 years |
| 40 | 40 years |
| 41 | 41 years |
| 42 | 42 years |
| 97 | Don't know |
| 99 | NIU (not in universe) |
| var_concept.title | Vocabulary |
|---|---|
| Child demography core Variables -- TOPICS | IPUMS |