63% (1968)

70% (1974)

58% (1969)

41% (1976)

43% (1984)

20% (1964)

33% (1971)

42% (1976)

38% (1966)

45% (1965)

15% (1980)

42% (1969)

0% (1951)

45% (1963)

65% (1948)

0% (1950)

0% (1954)

50% (1955)

48% (1968)

10% (1974)