79% (2016)

62% (2001)

76% (2008)

74% (1963)

75% (2006)

71% (2014)

67% (2017)

75% (2001)

64% (2006)

73% (2002)

72% (2006)

67% (2009)

69% (2000)

72% (2007)

75% (1995)

64% (2009)

74% (1974)

69% (2006)

66% (1996)

76% (2004)