80% (2010)

72% (2001)

76% (2013)

71% (1993)

71% (2012)

75% (2011)

66% (2007)

69% (2010)

71% (1990)

77% (2009)

78% (1998)

77% (2008)

71% (2006)

75% (2014)

86% (2005)

71% (2008)

70% (2015)

69% (2014)

58% (1988)

74% (2004)