81% (1984)

77% (1982)

72% (1987)

69% (1984)

65% (1982)

67% (1978)

50% (1991)

56% (1985)

50% (1982)

0% (1982)

70% (1974)

66% (1986)

20% (1990)

62% (1979)

64% (1992)

50% (1984)

37% (1979)

50% (1983)

53% (1979)

58% (1983)