58% (1983)

64% (1982)

40% (1981)

66% (1984)

60% (1982)

64% (1986)

63% (1984)

73% (1982)

49% (1985)

0% (1989)

52% (1983)

77% (1984)

70% (1985)

52% (1984)

43% (1989)

82% (1981)

59% (1982)

57% (1984)

43% (1986)

58% (1985)