A composite index measuring average achievement in three basic dimensions of human development—a long and healthy life, knowledge and a decent standard of living. 1=the most developed.

Human development index (score)

19902000200520102011201220132014201520162017201820192020
Gabon0.600.630.630.660.660.670.670.680.690.690.690.710.700.70
Equatorial Guinea0.510.570.610.580.580.590.590.650.590.580.600.650.65
Congo0.540.510.470.580.520.540.550.560.610.580.570.580.600.60
Cameroon0.440.430.470.520.510.530.530.540.560.550.560.580.590.59
Chad0.290.330.360.380.390.390.400.390.390.400.400.400.40
Central African Republic0.330.320.340.360.370.380.360.370.370.380.390.410.390.39