49% (1970)

58% (1970)

57% (1971)

53% (1972)

53% (1973)

35% (1971)

66% (1966)

48% (1972)

57% (1972)

35% (1966)

65% (1966)

62% (1974)

50% (1964)

52% (1973)

60% (1964)

55% (1964)

56% (1965)

57% (1968)

50% (1964)

0% (1966)