| Value | Category |
|---|---|
| 1 | No formal education |
| 10 | Kindergarten |
| 11 | Elementary grade 1 |
| 12 | Elementary grade 2 |
| 13 | Elementary grade 3 |
| 14 | Elementary grade 4 |
| 15 | Elementary grade 5 |
| 16 | Elementary grade 6 |
| 17 | Elementary grade 7 |
| 19 | Elementary not specified grade |
| 20 | Secondary grade 1 |
| 21 | Secondary grade 1 |
| 22 | Secondary grade 2 |
| 23 | Secondary grade 3 |
| 24 | Secondary grade 4 |
| 25 | Secondary grade 5 |
| 26 | Secondary grade 6 |
| 29 | Secondary not specified grade |
| 31 | University, 1st year |
| 32 | University, 2nd year |
| 33 | University, 3rd year |
| 34 | University, 4th year |
| 35 | University, 5th year |
| 36 | University, 6th year |
| 37 | Bachelor degree |
| 38 | Higher than Bachelor degree |
| 39 | University not specified level |
| 40 | Lower vocational |
| 50 | Upper vocational |
| 60 | High vocational |
| 61 | Teacher training |
| 62 | Technical and advanced vocational |
| 90 | Other education |
| 99 | Unknown or not reported |
| Sysmiss |