64% (2009)

78% (1977)

66% (1989)

58% (1955)

78% (1969)

73% (1975)

40% (1966)

63% (2006)

70% (1957)

67% (1982)

77% (1975)

55% (2011)

74% (2015)

70% (2018)

74% (1985)

69% (1972)

58% (1969)

77% (1967)

83% (1993)

53% (1958)