57% (1971)

49% (1970)

58% (1970)

52% (1973)

45% (1972)

35% (1971)

35% (1966)

62% (1974)

50% (1964)

54% (1959)

57% (1968)

60% (1964)

47% (1966)

44% (1971)

57% (1972)

0% (1962)

49% (1973)

66% (1966)

50% (1964)

52% (1972)