84% (2004)

81% (1988)

83% (1997)

80% (1984)

78% (1989)

80% (1986)

71% (2002)

78% (1992)

64% (1993)

80% (1995)

74% (1991)

70% (1999)

78% (1985)

75% (2007)

67% (2018)

73% (1993)

77% (2000)

74% (2014)

61% (1986)

50% (2014)