72% (1957)

62% (2015)

68% (2020)

67% (1954)

65% (1963)

62% (1971)

69% (1970)

73% (1972)

73% (1973)

71% (2012)

67% (2003)

69% (2015)

63% (1993)

70% (1962)

62% (2003)

70% (2015)

54% (1999)

74% (1976)

69% (1999)

70% (1985)