70% (1952)

66% (1954)

79% (1965)

70% (1966)

71% (1952)

63% (1961)

70% (1966)

59% (1958)

64% (1966)

84% (1967)

35% (1956)

59% (1977)

50% (1958)

51% (1963)

50% (1949)

50% (1959)

74% (1962)

67% (1969)

66% (1968)

47% (1967)