71% (2023)

71% (2017)

74% (2022)

68% (1977)

71% (2002)

69% (2023)

59% (1996)

76% (1957)

67% (2010)

53% (2004)

65% (1963)

71% (1964)

75% (1989)

69% (2021)

75% (1980)

60% (1963)

56% (2005)

62% (1975)

47% (1961)

48% (1969)