38% (1998)

46% (1996)

60% (1991)

30% (1992)

50% (1996)

56% (2000)

57% (1995)

80% (1995)

55% (1999)

71% (1996)

40% (1994)

60% (1990)

57% (1996)

65% (1996)

55% (1997)

44% (1998)

100% (1998)

44% (1988)

50% (1993)

45% (1994)