73% (2004)

66% (2006)

73% (2011)

59% (2012)

73% (2013)

76% (2014)

62% (2014)

62% (2008)

64% (2011)

72% (2007)

62% (2009)

70% (2011)

68% (2015)

56% (2010)

72% (2008)

70% (2014)

60% (2008)

74% (2009)

52% (2006)

78% (2006)