72% (2023)

75% (2015)

71% (2018)

66% (2011)

57% (2015)

61% (2016)

69% (2006)

80% (1980)

71% (1985)

58% (1990)

76% (1969)

61% (1988)

69% (1982)

56% (2011)

59% (1977)

67% (1972)

71% (1967)

62% (2004)

61% (1981)

68% (1974)