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HDI - Human Development Index
– is a summary composite index that measures a country's average
achievements in three basic aspects of human development: longevity,
knowledge, and a decent standard of living. Longevity is measured by
life expectancy at birth; knowledge is measured by a combination of the
adult literacy rate and the combined primary, secondary, and tertiary
gross enrolment ratio; and standard of living by GDP per capita (PPP
US$).
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