64% (1968)

54% (1967)

69% (1967)

67% (1968)

65% (1964)

70% (1967)

56% (1964)

64% (1969)

66% (1964)

50% (1970)

44% (1967)

60% (1964)

57% (1967)

63% (1966)

62% (1963)

70% (1965)

40% (1966)

62% (1966)

0% (1963)

35% (1965)