| Value | Category | 
|---|---|
| 00 | No education | 
| 01 | Higher education completed | 
| 02 | Comprehensive secondary | 
| 03 | Vocational secondary | 
| 04 | Post-secondary | 
| 05 | Secondary | 
| 06 | Secondary not completed | 
| 07 | Vocational | 
| 08 | Primary completed | 
| 09 | Primary not completed | 
| 98 | Unknown | 
| 99 | NIU (not in universe) |