81% (1984)

77% (1982)

72% (1987)

70% (1974)

66% (1982)

66% (1986)

61% (1979)

56% (1985)

67% (1978)

37% (1979)

64% (1992)

68% (1988)

50% (1984)

20% (1982)

50% (1986)

69% (1984)

20% (1990)

0% (1982)

53% (1979)

0% (1989)