| Value | Category |
|---|---|
| 0 | Smaller than six years old |
| 1 | Literate but not completed any educational institution |
| 2 | Primary school(5 year) |
| 3 | Secondary school, vocational school at secondary school level or primary education (8 year) |
| 4 | High school |
| 5 | Vocational or technical high school |
| 6 | Higher educationgraduate |
| 7 | Master or doctorate |