The increase in the value of animal output in 2008 was mostly due to a rise in producer prices (+5.6%), while output volume (+0.1%) remained nearly stable. The increase in the price of pigs (+9.1%) was only partly offset by a fall in volume (-1.6%).
http://epp.eurostat.ec.europa.eu/pls/portal/docs/PAGE/PGP_PRD_CAT_PREREL/PGE_CAT_PREREL_YEAR_2009/PGE_CAT_PREREL_YEAR_2009_MONTH_04/5-02042009-EN-AP.PDF