45% (1985)

48% (1983)

69% (1986)

42% (1984)

71% (1982)

31% (1985)

68% (1980)

73% (1981)

58% (1958)

74% (1974)

41% (1985)

69% (1985)

55% (1960)

62% (1976)

50% (1962)

72% (1984)

73% (1981)

70% (1974)

75% (1986)

65% (1977)