62% (1997)

0% (2011)

43% (1996)

54% (2000)

55% (2008)

10% (2004)

70% (2010)

0% (2006)

28% (2010)

0% (2003)

43% (2014)

0% (2006)

32% (2012)

0% (2002)

90% (2009)

60% (2008)