73% (2004)

60% (2008)

72% (2013)

73% (2011)

70% (2014)

62% (2008)

66% (2006)

72% (2007)

64% (2011)

76% (2014)

72% (2008)

70% (2015)

70% (2011)

74% (2012)

68% (2015)

62% (2009)

56% (2010)

79% (2005)

73% (2010)

74% (2009)