62% (1979)

65% (1982)

77% (1982)

66% (1978)

71% (1974)

72% (1987)

65% (1986)

69% (1984)

56% (1985)

0% (1989)

50% (1983)

80% (1981)

58% (1983)

50% (1986)

20% (1982)

30% (1979)

50% (1991)

63% (1992)

67% (1979)

53% (1979)