55% (2006)

25% (2001)

44% (2005)

0% (2008)

36% (2003)

32% (2006)

34% (2005)

28% (2004)

23% (2009)

20% (2004)

48% (2010)

28% (2013)

36% (2009)

15% (2008)

33% (2002)

0% (2010)

0% (2008)

37% (2007)

36% (2008)

20% (2000)