48% (1983)

43% (1984)

45% (1985)

74% (1981)

74% (1974)

61% (1980)

31% (1985)

41% (1985)

30% (1990)

66% (1983)

50% (1962)

15% (1989)

71% (1982)

70% (1986)

70% (1979)

32% (1988)

63% (1981)

65% (1977)

67% (1982)

0% (1979)