78% (2012)

56% (2010)

58% (2006)

72% (2016)

52% (2007)

60% (2009)

70% (2017)

66% (2013)

63% (2011)

59% (2012)

63% (2009)

68% (2015)

67% (2015)

76% (2003)

77% (2012)

64% (2008)

64% (2009)

75% (2014)

71% (2013)

65% (2016)