69% (1967)

67% (1968)

64% (1968)

70% (1967)

65% (1964)

66% (1964)

64% (1969)

58% (1964)

57% (1967)

50% (1970)

62% (1963)

63% (1966)

63% (1965)

62% (1966)

35% (1965)

54% (1967)

35% (1964)

64% (1966)

70% (1966)

49% (1969)