58% (1983)

72% (1982)

66% (1984)

82% (1981)

56% (1981)

64% (1982)

64% (1986)

60% (1982)

42% (1988)

49% (1985)

43% (1986)

52% (1986)

0% (1988)

77% (1984)

63% (1984)

57% (1984)

59% (1982)

42% (1982)

100% (1986)

57% (1983)