Answered By: Edward Bilodeau Last Updated: Jul 12, 2017 Views: 3
Start with Economist Intelligence Unit - Country Data.
See also the World Bank - World Development Indicators.
If the information contained in these sources doesn't go back far enough, use the Datastream terminal on the 3rd floor (Room M3-53B) of the Humanities/McLennan library. Use the 'economic' component.