The IRS has released the 2005 Corporation Source Book:
The Corporation Source Book presents balance sheet, income statement, tax, and other selected items by size of total assets for all returns with and without net income. Statistical tables are available by industrial sectors, major groups within a sector, and minor industries within a major group. Industry detail is based on the North American Industry Classification System (NAICS). The Source Book, which underlies the Statistics of Income — Corporation Income Tax Returns publication (i.e., the Complete Report), is part of an annual series.
