71% (2006)

63% (2010)

63% (2008)

64% (2010)

55% (2008)

74% (2010)

79% (2006)

79% (2013)

66% (2008)

63% (2014)

70% (2017)

56% (2007)

72% (2011)

61% (2011)

58% (2009)

62% (2011)

59% (2013)

61% (2014)

67% (2008)

73% (2009)