77% (1993)

75% (1994)

80% (1994)

75% (1991)

78% (1988)

76% (1988)

72% (1994)

76% (1987)

70% (1985)

63% (2017)

70% (1973)

62% (1979)

75% (1979)

79% (1989)

54% (1988)

70% (2000)

81% (1989)

71% (1989)

80% (1989)

75% (1988)