85% (1988)

75% (1986)

59% (1986)

76% (1964)

71% (1973)

73% (1981)

75% (1964)

69% (1983)

62% (1974)

64% (1962)

61% (1991)

71% (1965)

76% (1981)

68% (1952)

66% (1972)

61% (1992)

68% (1984)

74% (1987)

70% (1986)

72% (1973)