56% (1985)

65% (1969)

76% (1962)

68% (1985)

56% (1977)

68% (1981)

60% (1992)

43% (1987)

50% (1984)

71% (1981)

59% (1980)

55% (1983)

55% (1974)

60% (1963)

35% (1978)

58% (1965)

20% (1991)

60% (1982)

34% (1973)

62% (1986)