73% (1961)

70% (1961)

73% (1962)

69% (1965)

64% (1966)

75% (1965)

73% (1964)

67% (1966)

72% (1964)

72% (1966)

73% (1966)

63% (1966)

59% (1966)

56% (1968)

63% (1966)

66% (1963)

61% (1967)

66% (1968)

67% (1961)

50% (1966)