The European Commission has issued since 2001 bi-annual reports on state aid in the State Aid Scoreboard, which provides statistical information on authorised state aid in each member state—available at:
http://europa.eu.int/comm/competition/state__aid/scoreboard/
Statistical information on state aid authorised before 2001 is given in the Commission’s Surveys on state aid in the European Union—at:
http://ec.europe.eu/comm/competition/state_aid/scoreboard/previous.html