73% (1989)

78% (1988)

65% (1989)

73% (1985)

78% (1985)

69% (1987)

66% (1987)

65% (1983)

55% (1987)

52% (1986)

64% (1989)

64% (1985)

61% (1986)

62% (1991)

71% (1988)

74% (1981)

58% (1986)

44% (1989)

59% (1982)

42% (1988)