| Result range | Equivalence (Level of Human Development) |
| 6 < x < 7.8 | Lowest |
| 7.8 < x < 9.6 | Lowest and lower |
| 9.6 < x < 11.4 | Lower |
| 11.4 < x < 13.2 | Low level |
| 13.2 < x < 15 | Low and medium |
| 15 < x < 16.8 | Medium |
| 16.8 < x < 18.6 | Medium and higher |
| 18.6 < x < 20.4 | High level |
| 20.4 < x < 22.2 | High and very high |
| 22.2 < x < 24 | Very high |