49% (1984)

64% (1982)

50% (1986)

51% (1987)

62% (1989)

57% (1984)

20% (1989)

65% (1991)

38% (1988)

59% (1991)

58% (1981)

72% (1989)

35% (1986)

0% (1980)

36% (1990)

60% (1983)

42% (1988)