79% (1966)

48% (2009)

79% (2002)

63% (2010)

70% (2004)

70% (2014)

65% (2007)

69% (2006)

64% (2010)

68% (2018)

68% (1985)

61% (2012)

62% (2007)

69% (1990)

66% (1990)

61% (1982)

55% (1993)

52% (1977)

61% (2007)

59% (1999)