35% (2002)

0% (1990)

0% (2007)

55% (2010)

10% (1999)

0% (2008)

40% (2006)

0% (1987)

0% (1996)

0% (1997)

0% (1988)

0% (2008)

30% (2011)

0% (2004)

57% (2009)

0% (2003)

0% (2004)

15% (2010)

0% (2010)

80% (2009)