64% (1968)

67% (1968)

70% (1967)

64% (1969)

69% (1967)

56% (1964)

35% (1964)

65% (1964)

65% (1964)

57% (1967)

62% (1963)

63% (1965)

63% (1966)

70% (1966)

54% (1967)

62% (1966)

60% (1964)

70% (1965)

50% (1962)

49% (1969)