62% (1992)

84% (1988)

61% (1986)

75% (1986)

76% (1964)

72% (1981)

75% (1989)

70% (1983)

56% (1957)

74% (1987)

73% (1990)

55% (1994)

75% (1964)

69% (1983)

72% (1965)

62% (1967)

64% (1962)

55% (1987)

70% (1973)

62% (1985)