84% (1988)

75% (1986)

59% (1986)

76% (1964)

72% (1981)

69% (1983)

71% (1965)

74% (1964)

70% (1983)

67% (1952)

71% (1973)

62% (1992)

64% (1962)

61% (1991)

68% (1975)

67% (1972)

72% (1973)

73% (1990)

62% (1985)

63% (1993)