20% (2009)

55% (2008)

37% (1996)

10% (2007)

0% (2005)

25% (1997)

0% (2009)

35% (2005)

10% (2007)

30% (2003)

10% (2005)

50% (2011)

90% (2003)

0% (2006)

20% (2009)

0% (2011)

25% (2006)

10% (2006)

30% (2006)

20% (2001)