| Value | Category |
|---|---|
| 1 | high school - general (not professional) |
| 2 | high school - technical / vocational |
| 3 | Post-secondary - Diploma |
| 4 | college / university - bachelor's degree |
| 5 | college / university - master's degree |
| 6 | college / university - phd |
| 96 | other: specify |
| 98 | don't know |
| 99 | refused to answer |
| Missing value |