76% (1982)

57% (1984)

67% (1991)

72% (1986)

65% (1986)

40% (1992)

75% (1990)

40% (1988)

50% (1990)

0% (1992)

0% (1986)

55% (1988)

46% (1982)

0% (1987)

0% (1987)

68% (1988)

0% (1983)

72% (1989)

25% (1985)

0% (1987)