| Value | Category | 
|---|---|
| 1 | No schooling | 
| 2 | Incompleted primary school | 
| 3 | Primary school | 
| 4 | Package A | 
| 5 | General junior high school | 
| 6 | Vocational junior high school | 
| 7 | Package B | 
| 8 | General senior high school | 
| 9 | Vocational senior high school | 
| 10 | Package C | 
| 11 | Diploma I/II | 
| 12 | Diploma III | 
| 13 | D IV/S1 | 
| 14 | S2/S3 |