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United States Census

This research guide highlights the electronic and print resources published by the U.S. Census Bureau and select resources that accompany Census research.

Key Economic Indicators

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SIC vs NAICS

The North American Industry Classification System has been used since the 2002 Economic Census. If you are comparing pre-NAICS data and need the former SIC code, use the Bridge between NAICS and SIC to find the proper code.

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