72% (1992)

72% (1993)

47% (1995)

60% (1996)

73% (1990)

60% (1992)

48% (1995)

27% (1996)

45% (1995)

0% (1992)

65% (1989)

100% (1991)

37% (1993)

50% (1994)

50% (1990)

0% (1994)

55% (1992)

100% (1994)