58% (1977)

50% (1963)

49% (1939)

59% (1939)

64% (1965)

62% (1976)

56% (1960)

56% (1983)

55% (1969)

67% (1937)

64% (1962)

60% (1976)

50% (1967)

55% (1968)

67% (1936)

63% (1945)

53% (1959)

61% (2006)

56% (1983)

49% (1955)