75% (1973)

60% (1972)

76% (1960)

68% (2014)

70% (1964)

64% (1965)

61% (1979)

74% (1965)

64% (1970)

69% (1967)

72% (1966)

70% (1963)

70% (1983)

68% (1973)

55% (1968)

63% (1970)

80% (1965)

65% (1970)

70% (1970)

70% (1973)