The United Nations categorizes nations based on a set of criteria related to the Human Development Index – HDI. Calculation of HDI combines four major indicators: life expectancy for health, expected years of schooling, mean of years of schooling for education and Gross National Income per capita for standard of living. In 2021 these nations are ranked into four categories as follows:
Very High Human Development - VHHD
High Human Development – HHD
Medium Human Development – MHD
Low Human Development – LHD