Below are links to historical census data for three parts of the Economic Census: the Census of Retail Trade, the Census of Service Industries, and the Census of Manufactures. If you want to use any of this data, I recommend downloading the PDF versions of the documents (please note, some files are very large). For 2007 and 2012 data, see the Economic Census via American FactFinder.
Census of Retail Trade
Census of Service Industries
Note: Service industries are broken into more granular categories from 1997 onward.
Census of Manufactures