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Top 10 Countries in 2100 by GDP PPP (1981-2100): Gross domestic product (GDP) is a monetary measure of the market value of all the final goods and services produced in a specific time period, often (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries; therefore using a basis of GDP per capita at purchasing power parity (PPP) is arguably more useful when comparing differences in living standards between nations.
