45% (1999)

28% (2005)

20% (2001)

15% (2003)

29% (2002)

18% (2004)

23% (2007)

15% (2012)

32% (2007)

20% (2002)

40% (2002)

39% (2010)

34% (2012)

10% (2004)

40% (2008)

29% (2008)

0% (2006)

20% (2001)

38% (2009)

0% (2007)