63% (1968)

42% (1976)

39% (1984)

45% (1963)

53% (1969)

41% (1976)

69% (1974)

38% (1966)

48% (1968)

30% (1971)

42% (1969)

45% (1965)

15% (1980)

20% (1964)

0% (1949)

20% (1964)

68% (1954)

10% (1974)

40% (1967)

70% (1954)