24% (1997)

30% (1997)

23% (2005)

35% (1991)

30% (2004)

35% (1985)

35% (1997)

37% (1992)

0% (2006)

55% (1993)

0% (2005)

37% (1993)

10% (2007)

51% (2004)

23% (2005)

40% (2002)

72% (2006)

50% (1994)