| Value | Category |
|---|---|
| 1 | illiteratell |
| 2 | literate without diploma |
| 3 | primary school (5 years) |
| 4 | primary education(8 years) |
| 5 | junior high school (8=5+3) |
| 6 | vocational school at jr. high (8-9 = 5+ 3-4) |
| 7 | high school 11-12 = 8-9 + 3-4 |
| 8 | vocational school at high |
| 9 | 2 year higher education (univ.) |
| 10 | 4 year higher educationv (univ.) |
| 11 | master and doctorate |