| Value |
Category |
| 01 |
Without instruction |
| 11 |
Primary level, grade 1 |
| 12 |
Primary level, grade 2 |
| 13 |
Primary level, grade 3 |
| 14 |
Primary level, grade 4 |
| 15 |
Primary level, grade 5 |
| 16 |
Primary level, grade 6 |
| 17 |
Primary level, grade unknown |
| 21 |
Middle school level, grade 7 |
| 22 |
Middle school level, grade 8 |
| 23 |
Middle school level, grade 9 |
| 24 |
Middle school level, grade unknown |
| 31 |
High school level, grade 10 |
| 32 |
High school level, grade 11 |
| 33 |
High school level, grade 12 |
| 34 |
High school level, grade unknown |
| 41 |
University, year 1 |
| 42 |
University, year 2 |
| 43 |
University, year 3 |
| 44 |
University, year 4 |
| 45 |
University, year 5 |
| 46 |
University, year 6 |
| 47 |
University level, year unknown |
| 51 |
Master level |
| 52 |
Doctoral level |
| 53 |
Other, post-university |
| 61 |
Vocational school |
| 62 |
Technical school |
| 63 |
Other technical centers |
| 98 |
Unknown |
| 99 |
NIU (not in universe) |
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.