65% (1997)

69% (1999)

0% (1994)

60% (1995)

70% (1999)

66% (1996)

60% (2000)

0% (1997)

40% (1997)

50% (1989)

0% (2000)

58% (1998)

0% (1994)

69% (1993)

0% (1994)

67% (1996)

55% (1996)

33% (1999)

64% (2000)

0% (1996)