Kilde: ZEUS-rapport, januar 1990, på grundlag af analyse af en Eurobarometeropinionsundersøgelse udført for Kommissionen i de 12 medlemsstater, sommeren 1989.
Source: ZEUS report, January 1990, based on an analysis of the Eurobarometer opinion poll, conducted for the European Commission in the 12 Member States of the European Community in the summer of 1989.