| Value | Category |
|---|---|
| -9 | Don't know |
| 1 | Sin estudios |
| 2 | Primaria incompleta |
| 3 | Primaria completa |
| 4 | Secundaria incompleta |
| 5 | Secundaria completa |
| 6 | Terciario no universitario incompleto |
| 7 | Universitario incompleto |
| 8 | Terciario no universitario completo |
| 9 | Universitario completo |
| 10 | Postgrado |
| Sysmiss |