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The Penn World Tables provides purchasing power parity and national income accounts converted to international prices for 188 countries for some or all of the years 1950-2004. The European Union or the OECD provide more detailed purchasing power and real product estimates for their countries and the World Bank makes current price estimates for most PWT countries at the GDP level.
The World Bank’s World Development Indicators includes data and statistics on international development, including population, income, social, economic, financial, natural resources, and environmental indicators, covering individual countries as well as regional economies from 1960 to the present.