40% (2006)

15% (2010)

55% (2010)

0% (1990)

10% (1999)

0% (2010)

30% (2011)

0% (2008)

35% (2002)

80% (2009)

57% (2009)

0% (1996)

0% (1993)

0% (2007)

0% (1987)

0% (2004)

0% (2004)

55% (2010)

0% (2009)

0% (1988)