56% (1979)

53% (1986)

58% (1978)

65% (1989)

42% (1994)

0% (1986)

51% (1988)

0% (1983)

48% (1980)

52% (1982)

0% (1980)

67% (1977)

54% (1977)

37% (1983)

20% (1990)

44% (1981)

76% (1982)

72% (1983)

62% (1985)

0% (1992)