59% (1967)

49% (1970)

59% (1962)

48% (1964)

56% (1965)

0% (1968)

50% (1969)

0% (1971)

0% (1957)

65% (1964)

40% (1962)

60% (1963)

68% (1967)

42% (1962)

55% (1964)

52% (1968)

35% (1970)

50% (1963)

40% (1968)

60% (1960)