Gross domestic product
Gross domestic product (GDP) is a monetary measure of the market value of all the final goods and services produced in a period of time, often annually 
GDP (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.
List of countries by past and projected GDP (nominal)
This is an alphabetical list of countries by past and projected gross domestic product (nominal) as ranked by the IMF. Figures are based on official exchange rates, not on the purchasing power parity (PPP) methodology. Values are given in millions of United States dollars (USD) and have not been adjusted for inflation. These figures have been taken from the International Monetary Fund's World Economic Outlook (WEO) Database (April 2018 edition) and/or other sources.