69% (1987)

69% (1976)

48% (1981)

59% (1970)

70% (1980)

67% (1984)

76% (1970)

61% (1979)

64% (1979)

77% (1976)

63% (1947)

67% (1964)

46% (1992)

62% (1967)

43% (1969)

59% (1991)

67% (1992)

10% (1989)

50% (1961)

69% (1952)