The world bank group's "World Development Indicators (WDI)" is the World Bank's annual compilation of data about development. These WDI's are accessible on line through the Data Query section of the worldbank web site.
Data Query offers free access to a segment of the World Development Indicators (WDI) database, an extensive collection of data about development. This segment includes 54 timeseries indicators for 208 countries and 18 groups, spanning 5 years (1997 to 2001). You can choose several ways of displaying the data: index, percentage change, and graphs, and can export the result in standard formats. Definitions and sources are also available.
To find more about the world development indicators and to perform an on line data query click here.