82% (1984)

62% (1979)

0% (1989)

72% (1983)

67% (1979)

58% (1983)

73% (1987)

0% (1991)

50% (1984)

53% (1979)

77% (1982)

50% (1980)

50% (1983)

70% (1974)

20% (1990)

30% (1991)

20% (1982)

80% (1981)

68% (1988)

56% (1985)