The World Bank Group provides free online access to its comprehensive set of data on living standards around the globe--some 2,000 indicators, including hundreds that go back 50 years. The data is available in Arabic, French, and Spanish in addition to English. Databases include: World Development Indicators; Global Development Finance; Africa Development Indicators; Global Economic Monitor; Doing Business; Education Statistics; Health, Nutrition and Population Statistics, Millennium Development Indicators; Gender Statistic; and Actionable Governance Indicators. (Updates ongoing)
This permalink is a direct, persistent URL to the database that will always work and won't break.