74% (2010)

76% (2010)

75% (2006)

71% (2014)

74% (2012)

66% (2012)

71% (2015)

73% (2011)

70% (2007)

67% (2007)

57% (2013)

64% (2013)

70% (2009)

72% (2008)

70% (2010)

71% (2011)

59% (2009)

72% (2010)

76% (2013)

58% (2011)