The present report details, in its first part, the main methodological features of the EPDS, with an special emphasis on the indicators and measurement indexes used. It presents, just the same, in its second part, the main results obtained, with special attention to the changes observed in the long term. To this end an adjustment has been introduced into the different data files so as to allow for an adjusted comparison –based on the thresholds system existing in 2008– for the whole of the period with available data, that is to say from 1986 to 2008.