61% (1971)

60% (1972)

67% (1947)

63% (1953)

67% (1979)

54% (1975)

51% (1973)

35% (1973)

30% (1978)

57% (1974)

53% (1977)

40% (1974)

53% (1973)

69% (1956)

50% (1945)

63% (1970)

40% (1969)

66% (1973)

48% (1959)

53% (1977)