60% (1972)

71% (1967)

51% (1969)

78% (1963)

57% (1974)

61% (1972)

68% (1976)

59% (1970)

67% (1972)

69% (1961)

59% (1976)

53% (1956)

48% (1971)

50% (1965)

64% (1959)

0% (1962)

0% (1958)

41% (1954)

10% (1980)

40% (1970)