72% (1977)

73% (1990)

70% (2005)

75% (2009)

73% (2000)

65% (2020)

68% (1990)

73% (1970)

67% (1974)

62% (2017)

78% (2012)

68% (1984)

75% (1986)

68% (1982)

71% (1987)

73% (1972)

72% (1977)

71% (1981)

74% (1973)

70% (2023)