63% (1988)

70% (1993)

78% (1946)

71% (1985)

73% (1993)

59% (1985)

61% (1985)

58% (1996)

66% (1992)

68% (1994)

69% (1996)

61% (1995)

69% (1987)

63% (1980)

62% (1995)

67% (1994)

59% (1958)

61% (1992)

64% (1993)

60% (1992)