71% (1963)

75% (1970)

75% (1963)

73% (1964)

66% (1965)

58% (1967)

77% (1964)

73% (1975)

55% (1972)

77% (1967)

61% (1973)

64% (1965)

67% (1967)

56% (1971)

61% (1970)

64% (1973)

61% (1963)

59% (1965)

45% (1972)

50% (1974)