| Value | Category |
|---|---|
| 1 | X - No schooling |
| 2 | 0 - Early childhood education |
| 3 | 1 - Primary education |
| 4 | 2 - Lower secondary education |
| 5 | 3 - Upper secondary education |
| 6 | 4 - Post-secondary non-tertiary education |
| 7 | 5 - Short-cycle tertiary education |
| 8 | 6 - Bachelor's or equivalent level |
| 9 | 7 - Master's or equivalent level |
| 10 | 8 - Doctoral or equivalent level |
| 11 | 9 - Not elsewhere classified |