55% (2010)

0% (1996)

10% (1999)

15% (2010)

57% (2009)

0% (2005)

40% (2006)

55% (2010)

35% (2002)

30% (2011)

80% (2009)

60% (2001)

0% (2008)

0% (2010)

0% (2004)

0% (2008)

0% (1997)

0% (2011)

0% (2003)

0% (2004)