64% (2012)

58% (2013)

57% (2013)

63% (2012)

58% (2012)

63% (2009)

73% (2007)

71% (2008)

56% (2009)

70% (2010)

65% (2010)

58% (2006)

65% (2010)

68% (2013)

56% (2012)

73% (2013)

68% (2014)

59% (2009)

54% (2009)

73% (2008)