| Value | Category |
|---|---|
| 0 | NURSERY/PRESCHOOL |
| 1 | PRIMARY |
| 2 | SECONDARY |
| 3 | PRIMARY VOCATIONAL EDUCATION |
| 4 | PRIMARY PROFESSIONAL EDUCATION BASED ON SECONDARY GENERAL EDUCATION |
| 5 | SECONDARY PROFESSIONAL EDUCATION |
| 6 | BACHELOR DEGREE |
| 7 | MASTER DEGREE |
| 8 | SPECIALIST DEGREE |
| 9 | CANDIDATE OF SCIENCE |
| 10 | DOCTOR OF SCIENCE |
| 888 | DON'T KNOW |
| 1001 | .A |