70% (1967)

55% (1971)

65% (1974)

60% (1967)

75% (1971)

50% (1970)

65% (1972)

59% (1972)

37% (1972)

60% (1971)

49% (1969)

30% (1971)

50% (1962)

51% (1971)

0% (1965)

60% (1971)

37% (1974)