78% (1971)

60% (1972)

75% (1978)

65% (2008)

68% (1988)

62% (1982)

68% (2016)

70% (1961)

70% (2006)

73% (2023)

57% (1985)

50% (2013)

65% (2001)

78% (1974)

70% (1983)

58% (2008)

74% (1960)

80% (1984)

70% (2021)

68% (2013)