58% (1996)

63% (1980)

78% (1946)

68% (1987)

58% (1985)

70% (1993)

61% (1995)

63% (1988)

60% (1994)

62% (1991)

70% (1985)

62% (1996)

58% (1987)

69% (1991)

68% (1994)

61% (1992)

63% (1991)

68% (1989)

67% (1994)

64% (1987)