| Value | Category |
|---|---|
| 1 | Has never gone to school |
| 2 | Non formal education |
| 3 | Primary EP1 |
| 4 | Primary EP2 |
| 5 | Secundary 1º ciclo |
| 6 | Secundary 2º ciclo |
| 7 | Technical elementary |
| 8 | Technical basic |
| 9 | Technical medium |
| 10 | Curso de Formação de Professores |
| 11 | Superior |
| 12 | Other |
| 13 | Don't know |
| 99 | No answer |
| 999 | Not applicable |