42% (1988)

38% (1988)

49% (1984)

64% (1991)

60% (1983)

56% (1984)

59% (1991)

36% (1990)

50% (1986)

72% (1989)

64% (1982)

0% (1980)

58% (1981)

62% (1989)

35% (1986)

51% (1987)

20% (1989)