EEA standard re-use policy: unless otherwise indicated, re-use of content on the EEA website for commercial or non-commercial purposes is permitted free of charge, provided that the source is acknowledged (http://www.eea.europa.eu/legal/copyright). Copyright holder: European Environment Agency (EEA).
European shares have been calculated as a weighted average over 22 EEA countries, using the total number of investigated sites as weights.
Belgium refer to the Flanders and the Brussels region only.
Time coverage: 2006;
Data for Belgium, Croatia: 2004;