The Penn World Tables
provide purchasing power parity and national income accounts converted to international prices for 189 countries/territories for some or all of the years 1950-2010. 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.
World Bank Data and Research Division
World Health Finance Report Health systems financing: the path to universal coverage from the World Health Organization