| Value | Category | 
|---|---|
| 10 | primary 4 | 
| 12 | primary 7 | 
| 14 | primary 8 | 
| 15 | technical education | 
| 16 | ordinarysecondary school | 
| 17 | diploma | 
| 18 | advance secondary education | 
| 19 | advanced diploma | 
| 20 | first degree | 
| 21 | masters | 
| 22 | phd | 
| 33 | illiterate | 
| 34 | literate but no schooling | 
| 35 | ngo school completed |