81% (2013)

79% (2009)

77% (2006)

82% (2013)

80% (2010)

74% (2009)

73% (2009)

71% (2005)

78% (2014)

74% (2008)

70% (2011)

75% (2007)

77% (2007)

60% (2006)

72% (2016)

79% (2013)

49% (1978)

100% (2015)

0% (2007)

77% (2012)