69% (1956)

60% (1972)

61% (1971)

67% (1973)

63% (1953)

53% (1973)

68% (1979)

57% (1975)

40% (1974)

36% (1973)

54% (1975)

51% (1973)

30% (1978)

63% (1972)

60% (1960)

67% (1947)

49% (1972)

48% (1959)

50% (1945)

57% (1974)