[25: Special Eurobarometer 338 (April 2010), Special Eurobarometer 407 (November 2013) and Special Eurobarometer 445 (June 2016)]
Ewrobarometru Speċjali 338 (April 2010), Ewrobarometru Speċjali 407 (Novembru 2013) u Ewrobarometru Speċjali 445 (Ġunju 2016)]