55% (2011)

64% (2013)

64% (2011)

59% (2009)

69% (2008)

73% (2007)

66% (2008)

75% (2014)

59% (2010)

56% (2011)

70% (2007)

59% (2013)

65% (2006)

59% (2009)

64% (2008)

66% (2007)

64% (2010)

76% (2008)

55% (2009)

68% (2009)