23% (1997)

28% (2000)

0% (1995)

60% (1996)

55% (1996)

57% (1993)

10% (1997)

0% (1993)

32% (2005)

35% (1995)

10% (2005)

32% (1994)

10% (2003)

0% (1994)

30% (1999)

80% (2000)

50% (2001)

30% (1998)

10% (1996)

30% (1997)