The Statistics of Income Division has released Corporation Source Book, 2000:

Data tables from the Tax Year 2000 Corporation Source Book of Statistics of Income (Publication 1053) are now available in Excel spreadsheets for viewing or downloading from Tax Stats at the IRS.gov Web site. These tables present detailed income statement, balance sheet, tax, and selected items, by industrial sector, and major and minor industrial groups. For each industrial group, the data are further classified by size of total assets. Data are presented for all corporate returns and for those returns with net income. Separate statistics on S corporations are also included by industrial sector and asset size. Data from the Tax Years 2001-2003 Corporation Source Book publications will be available later this year. Tax Stats contains other statistics from corporation income tax returns, as well as statistics from other types of entities (e.g., individuals, exempt organizations, and partnerships).

For additional information, see here.