76% (1978)

40% (1985)

50% (1969)

57% (1980)

43% (1985)

65% (1991)

77% (1998)

70% (1965)

63% (1986)

35% (1989)

70% (1980)

62% (1962)

50% (1963)

63% (1995)

56% (1963)

50% (1990)

58% (1990)

68% (1956)

63% (1978)

0% (1989)