80% (2010)

76% (2013)

71% (1993)

71% (2012)

75% (2011)

86% (2005)

66% (2007)

68% (2014)

69% (2010)

77% (2009)

69% (2015)

78% (1998)

71% (2006)

71% (2008)

74% (2004)

76% (2001)

74% (2014)

87% (2007)

49% (2005)

69% (2009)