73% (1985)

60% (1987)

61% (1989)

90% (1994)

57% (1992)

58% (1986)

100% (1993)

55% (1986)

45% (1990)

75% (1993)

50% (1994)

60% (1988)

53% (1997)

75% (1991)

47% (1984)

38% (1996)

35% (1988)

0% (1992)

66% (1995)

0% (1987)