57% (1963)

78% (1991)

76% (2011)

73% (1995)

77% (1997)

74% (1985)

72% (2003)

71% (1993)

80% (2012)

65% (2000)

73% (2001)

79% (2001)

65% (1992)

78% (2008)

61% (2017)

66% (1997)

70% (1992)

68% (2004)

65% (1999)

63% (2019)