51% (1978)

69% (2007)

64% (2021)

56% (2023)

66% (2011)

67% (1983)

52% (2012)

70% (2012)

76% (1992)

62% (2017)

64% (1986)

64% (2009)

67% (2014)

66% (1986)

51% (2005)

56% (1980)

56% (2010)

67% (2021)

69% (2014)

62% (2006)