76% (2011)

68% (1978)

78% (2002)

51% (2000)

75% (2005)

74% (2009)

80% (2008)

81% (2005)

85% (2010)

84% (1999)

77% (2003)

44% (2003)

75% (1965)

87% (1999)

82% (2011)

80% (2004)

79% (1996)

77% (2015)

85% (2011)

55% (2017)