75% (1982)

57% (1984)

72% (1986)

66% (1991)

65% (1986)

55% (1988)

50% (1990)

40% (1988)

68% (1988)

72% (1989)

0% (1987)

25% (1985)

30% (1992)

0% (1986)

0% (1992)

63% (1987)

0% (1989)

46% (1982)

40% (1992)

75% (1990)