76% (2016)

67% (2015)

69% (2016)

64% (2019)

74% (2008)

72% (2014)

68% (2004)

63% (2014)

79% (1997)

66% (2016)

79% (2014)

79% (2017)

76% (2009)

56% (2009)

68% (1992)

77% (2015)

74% (2002)

73% (2014)

75% (2014)

61% (2017)