Figures on EU revenue dating back to 1970 and expenditure dating back to 1958 can be found in the tables annexed to the annual financial report 2008.
Budgets since 2007 are available in electronic format from the Budget online website.
For official documents on adopted budgets, see the relevant issues of the Official Journal (OJ) in the EUR-lex online database:
Only documents from 1998 onwards are available on this site. To access documents from before 1998, please consult the EU Publications Office.
The European Court of Auditors publishes an annual report on budget implementation (use the search box at the bottom of the page to access previous editions).