43% (1986)

66% (1984)

64% (1986)

58% (1983)

73% (1982)

59% (1983)

64% (1982)

52% (1986)

60% (1982)

52% (1983)

70% (1985)

82% (1981)

42% (1982)

58% (1985)

57% (1984)

40% (1981)

42% (1988)

52% (1984)

77% (1984)

60% (1988)