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Human development index (HDI)

(Index, 1=the most developed)

The HDI is based on the following three indicators: longevity, as measured by life expectancy at birth; educational attainment, as measured by a combination of adult literacy (two-thirds weight) and combined primary, secondary and tertiary enrollment ratios (one-third weight); and standard of living, as measured by real GDP per capita (PPP $). Source : UNDP, Human Development Report.