70% (1993)

63% (1988)

73% (1993)

78% (1946)

62% (1991)

68% (1994)

65% (1992)

71% (1985)

58% (1996)

61% (1985)

59% (1985)

61% (1995)

69% (1996)

59% (1958)

69% (1987)

49% (1994)

67% (1994)

52% (1988)

69% (1991)

65% (1987)