58% (1971)

58% (1970)

49% (1970)

54% (1959)

35% (1971)

53% (1973)

51% (1972)

48% (1972)

62% (1974)

65% (1966)

0% (1962)

55% (1964)

35% (1966)

55% (1965)

56% (1965)

0% (1966)

57% (1968)

60% (1964)

51% (1973)

50% (1964)