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Many government agencies have statistical information on a wide range of topics. You may need to do further research to find out which agency has the information you're looking for or can help you find it.
Summary of statistics on the social, political, and economic organization of the United States.
Think about whether or not your industry is regulated by any government agencies. These overseeing groups often have publications, statistics, and web sites of their own that can add valuable insider perspective to your research.