If you are looking for economic data, FRED is a great place to start. Put out by the Federal Reserve Bank of St. Louis, it’s an online database consisting of more than 61,000 economic data time series from 48 national, international, public, and private sources.
A sampling of the types of data available:
- Selected Interest Rates
- Gross Domestic Product 1947-Present
- Consumer Price Index 1947-Present
- Bank Prime Loan Rate 1949-Present
- Resident Population in Massachusetts 1900-Present
This resource also offers a set of data tools that will enable you to create your own graphs, access archival data, and download data with an Excel Add-in.