60% (1996)

60% (1993)

60% (1997)

50% (2001)

28% (1999)

50% (1998)

60% (1992)

58% (1994)

50% (1992)

28% (2000)

35% (1993)

0% (1999)

40% (2000)

100% (1999)

0% (1989)

45% (1995)

64% (1993)

25% (1996)

50% (2000)