76% (1960)

68% (2014)

71% (1964)

74% (1965)

61% (1979)

74% (1973)

70% (1983)

63% (1965)

60% (1972)

64% (1970)

69% (1970)

72% (1966)

69% (1967)

68% (1973)

63% (1970)

65% (1963)

70% (1963)

55% (1968)

58% (1935)

58% (1972)