Kelvin Smith Library
Track the performance of your industry overtime. The U.S. Census Bureau conducts an Economic Census every 5 years. This data is strictly statistical in nature. No companies are named. However you will see how many establishments existed in your industry, the value of shipments or other relevant measures of productivity, number of employees etc. Data is available online from 1992 forward. Earlier data is available in print in the Government Documents collection at Kelvin Smith Library. http://www.census.gov/econ/census07/
Sample report for Ohio below.