78% (2008)

78% (1991)

76% (2011)

74% (1985)

77% (1997)

57% (1963)

72% (1995)

71% (1993)

72% (2003)

78% (2001)

80% (2012)

65% (2000)

68% (2004)

67% (1997)

73% (2001)

70% (1992)

65% (1992)

61% (2017)

65% (1999)

74% (2002)