45% (2000)

0% (1998)

25% (1996)

100% (1999)

60% (1997)

68% (1990)

59% (1992)

53% (2001)

72% (1996)

0% (1989)

0% (1999)

60% (1992)

28% (2000)

64% (1993)

50% (1993)

60% (1993)

50% (2000)

60% (1996)

40% (1993)