76% (1960)

68% (2014)

74% (1973)

74% (1965)

70% (1964)

63% (1965)

61% (1979)

64% (1970)

70% (1983)

71% (1967)

69% (1967)

70% (1970)

54% (1968)

61% (1972)

69% (1973)

70% (1963)

61% (1965)

54% (1980)

63% (1970)

65% (1970)