71% (2006)

64% (2010)

74% (2010)

74% (2012)

79% (2006)

65% (2008)

73% (2009)

63% (2008)

79% (2013)

55% (2008)

63% (2010)

69% (2012)

76% (2007)

70% (2017)

72% (2011)

56% (2007)

77% (2008)

77% (2007)

65% (2010)

68% (2008)