| Value | Category |
|---|---|
| -88 | Refused |
| -66 | Other |
| None | |
| 1 | Preschool |
| 2 | Incomplete Elementary |
| 3 | Complete Primary |
| 4 | Incomplete Secondary Education |
| 5 | Complete Secondary Education |
| 6 | Incomplete High School or Baccalaureate |
| 7 | Complete High School or Baccalaureate |
| 8 | Normal |
| 9 | Technical or Commercial Career |
| 10 | Degree |
| 11 | Master's degree |
| 12 | Doctorate |
| Missing value |