ocr: Sierra Leone Human Development Index National Income HDI Life Expectancy 3798 6.2/100 78.5 63.8 42.0 42.0 4949 3E0 1051 Low Avg High Low Avg High Schooling Literacy 12.3 99.0 72.4 4.7 18.2 20.7 0.9 0.1 Low Avg High Low * Avg High The U.N. Human Development Index (HDI) combines indicators of national income, life expectancy, and eaucational attainment to give a composite measure of human progress.