64% (2010)

62% (2011)

74% (2010)

80% (2013)

79% (2006)

72% (2011)

73% (2009)

59% (2012)

56% (2007)

65% (2010)

70% (2009)

66% (2008)

66% (2009)

77% (2007)

63% (2008)

58% (2008)

76% (2007)

69% (2012)

66% (2011)

64% (2008)