73% (2004)

59% (2008)

73% (2013)

73% (2011)

72% (2007)

70% (2015)

76% (2014)

62% (2008)

66% (2006)

64% (2011)

74% (2009)

61% (2014)

68% (2015)

62% (2009)

74% (2012)

70% (2014)

59% (2012)

61% (2007)

56% (2010)

72% (2010)