35% (2003)

30% (2006)

0% (2007)

10% (2005)

50% (2011)

0% (2006)

0% (2008)

0% (2002)

25% (2006)

10% (2008)

10% (2006)

27% (2006)

45% (2006)

20% (2009)

10% (2009)

0% (2003)

10% (2004)

10% (2006)

0% (2004)

30% (1998)