64% (2010)

74% (2010)

79% (2006)

80% (2013)

73% (2009)

63% (2008)

56% (2007)

66% (2008)

59% (2012)

67% (2013)

74% (2009)

69% (2012)

66% (2011)

70% (2009)

77% (2007)

72% (2011)

64% (2008)

57% (2008)

67% (2008)

65% (2010)