75% (1982)

72% (1986)

57% (1984)

55% (1988)

25% (1985)

66% (1991)

65% (1986)

75% (1990)

0% (1989)

0% (1992)

0% (1984)

40% (1988)

68% (1988)

42% (1992)

40% (1992)

20% (1987)

50% (1990)

30% (1985)

49% (1982)

60% (1985)