70% (1982)

82% (1979)

76% (1988)

58% (1967)

69% (1990)

71% (1980)

73% (1956)

70% (1989)

65% (1987)

58% (1981)

56% (1966)

63% (1975)

60% (1970)

37% (1982)

60% (1983)

10% (1969)

68% (1962)

58% (1963)

0% (1985)

42% (1980)