Statistics for Longest-serving Prime Ministers of European Union countries

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Prime Minister	Country	% Correct
Helmut Kohl (1982-1998)	Germany	100%
Viktor Orbán (2010-incumbent)	Hungary	100%
Silvio Berlusconi (1994-1995, 2001-2006, 2008-2011)	Italy	100%
Aníbal António Cavaco Silva (1985-1995)	Portugal	95%
Mark Rutte (2010-2024)	The Netherlands	95%
Spyros Kyprianou (1977-1988)	Cyprus	90%
Konstantinos Simitis (1996-2004)	Greece	90%
Felipe González (1982-1996)	Spain	90%
Wilfried Martens (1979-1981, 1981-1992)	Belgium	85%
Thorvald Stauning (1929-1942)	Denmark	85%
Paavo Lipponen (1995-2003)	Finland	85%
Donald Tusk (2007-2014, 2023-incumbent)	Poland	80%
Janez Drnovšek (1992-2000)	Slovenia	80%
Tage Erlander (1946-1969)	Sweden	80%
Boyko Borisov (2014-2017, 2017-2021)	Bulgaria	75%
Adrian Năstase (2000-2004) / Călin Popescu-Tăriceanu (2004-2008)	Romania	75%
Georges Pompidou (1962-1968)	France	70%
Pierre Werner (1959-1974, 1979-1984)	Luxembourg	70%
Andrej Plenković (2016-incumbent)	Croatia	65%
Andrej Babiš (2017-2021)	Czechia	65%
Algirdas Brazauskas (2001-2006)	Lithuania	65%
Bertie Ahern (1997-2008)	Ireland	60%
Mikuláš Dzurinda (1998-2006)	Slovakia	60%
Bruno Kreisky (1970-1983)	Austria	55%
Valdis Dombrovskis (2009-2014)	Latvia	50%
Andrus Ansip (2005-2014)	Estonia	45%
Dom Mintoff (1971-1984)	Malta	40%