Quelle: Umfrage Nr. 55.1 ­ April ­ Mai 2001 Standard Eurobarometer 55 ­ Abb. 3.1 ###>Source: Eurobarometer 55.1 - Fieldwork April - May 2001 Eurobarometer 54.1 - Fieldwork Nov - Dec 2000 Standard Eurobarometer 55 - Fig. 3.4b