76% (1985)

74% (1981)

43% (1985)

65% (1984)

42% (1986)

76% (1984)

43% (1984)

63% (1984)

65% (1982)

50% (1988)

62% (1984)

43% (1983)

67% (1984)

50% (1984)

50% (1986)

61% (1986)

62% (1983)

57% (1984)

34% (1983)

44% (1988)