79% (1994)

77% (1993)

75% (1979)

75% (1994)

75% (1991)

78% (1988)

78% (1989)

76% (1987)

73% (1989)

76% (1988)

70% (1969)

70% (1985)

50% (1992)

63% (2017)

70% (1973)

72% (1989)

80% (1989)

57% (2001)

74% (1989)

54% (2018)