Eine Einrichtung der Universitätsbibliothek Mainz.

The WDI are the primary World Bank collection of development indicators, compiled from officially-recognized international sources. It presents the most current and accurate global development data available, and includes national, regional and global estimates.
IDS focuses on financial flows, trends in external debt, and other major financial indicators for developing countries. It includes over 200 time series indicators from 1970 to 2008, for most reporting countries.
The International Monetary Fund (IMF) offers numerous time series covering exchange rates, inflation, the national accounts, the balance of payments etc. Here is a short user guide on how to retrieve data from the IMF.