| Equation | Human Development Index |
| Human Development Index (−1) | 1.000 |
| Index of diversification of nontimber forest products | 0.119** (−2.04) |
| Forested area | 8.673* (−1.89) |
| Energy consumption per inhabitant | 0.192*** (−7.59) |
| Service sector | 0.003*** (2.68) |
| Constant | 0.005*** (−3.27) |