61% (1972)

57% (1974)

78% (1963)

61% (1972)

51% (1969)

71% (1967)

68% (1976)

59% (1970)

67% (1972)

64% (1959)

10% (1980)

53% (1956)

48% (1971)

41% (1954)

59% (1976)

50% (1965)

56% (1979)

80% (1954)

22% (1957)

40% (1956)