Statistical Abstract of the United States
BusDoc Ref Desk HA 202 (current edition; also available at APL, Lockwood and UGL-SEL Ref Desk)
BusDoc Ref HA 202 (1947-previous edition)
Lockwood Documents US C 3.134 (1957-previous edition)
http://www.census.gov/statab/www/ (current and selected earlier editions)
This annual Census Bureau publication is often the best starting place for statistical data. Tables cover all aspects of American social, political, and economic life.

Currency Converters and Foreign Exchange Rates
http://ublib.buffalo.edu/libraries/asl/guides/busdoc/currency-converters.html
A guide to the most useful sites for this type of information.

Economic Policy Institute: Data Zone
http://epinet.org/datazone/
This site is maintained by the non-profit Economic Policy Institute (EPI) and provides analysis for government-produced data.

Economic Statistics Briefing Room
http://www.whitehouse.gov/fsbr/esbr.html
Provides links to data on consumer price index, employment, interest rates, and more.

Federal Reserve Board Statistical Releases
http://www.federalreserve.gov/releases/
This site has the daily, weekly, monthly, and quarterly releases for a number of monetary indicators. Includes exchange rates, interest rates, and money stock.

FedStats
http://www.fedstats.gov/
Provides an excellent list of links to federal government agencies which produce statistics, a search engine for these sites, and an A-Z subject list of links.

Statistical Information Resources
http://ublib.buffalo.edu/libraries/asl/guides/busdoc/statistics_sources.html
An overview of statistical resources available in the University Libraries, both print and electronic.