75% (1960)

75% (1973)

71% (1964)

74% (1965)

61% (1979)

68% (2014)

63% (1965)

61% (1972)

64% (1970)

70% (1963)

72% (1966)

70% (1983)

80% (1965)

69% (1967)

63% (1970)

65% (1963)

55% (1968)

69% (1973)

70% (1970)

68% (1973)