30% (2007)

60% (2005)

82% (2011)

0% (2001)

75% (2000)

60% (1997)

20% (2003)

0% (2010)

20% (2013)

0% (2009)

30% (2011)

0% (2008)

100% (2009)

0% (2000)

37% (1997)

20% (1999)

0% (2002)

0% (2013)

60% (2012)

15% (2009)