81% (1984)

77% (1982)

72% (1987)

70% (1974)

65% (1982)

67% (1978)

56% (1985)

69% (1984)

62% (1979)

65% (1986)

37% (1979)

64% (1992)

53% (1979)

68% (1988)

50% (1982)

58% (1983)

50% (1986)

50% (1991)

50% (1984)

50% (1983)