67% (1977)

53% (1986)

72% (1983)

52% (1982)

52% (1980)

51% (1988)

58% (1978)

42% (1994)

56% (1979)

54% (1977)

64% (1990)

62% (1985)

20% (1990)

0% (1992)

76% (1982)

65% (1989)

37% (1983)

44% (1981)

0% (1986)

0% (1987)