73% (2004)

78% (2005)

72% (2013)

60% (2008)

73% (2011)

62% (2008)

72% (2007)

61% (2014)

70% (2014)

64% (2011)

76% (2014)

65% (2006)

62% (2009)

70% (2011)

69% (2004)

68% (2015)

70% (2015)

72% (2010)

74% (2009)

79% (2005)