74% (1971)

73% (2017)

72% (2015)

70% (2009)

69% (2014)

65% (1991)

45% (2009)

74% (1999)

66% (1974)

71% (2008)

69% (2005)

82% (1964)

69% (1985)

67% (2021)

70% (1951)

53% (1996)

76% (2000)

79% (2008)

64% (2019)

73% (2020)