79% (1955)

74% (1976)

75% (1978)

70% (1975)

79% (1972)

57% (1973)

56% (1960)

52% (1968)

50% (1949)

56% (1948)

52% (2012)

56% (1970)

53% (1949)

50% (1954)

61% (1965)

44% (1979)

50% (1955)

55% (1961)

67% (1974)

53% (1958)