10% (1990)

48% (1995)

0% (1998)

0% (2000)

50% (1992)

80% (2001)

57% (1997)

20% (2000)

25% (1993)

45% (1992)

28% (2003)

75% (1994)

20% (1997)

45% (1995)

70% (1990)

44% (1994)

37% (1990)

32% (1998)

40% (1990)

50% (1993)