61% (1969)

59% (2001)

58% (1940)

57% (1970)

60% (1948)

70% (1973)

55% (1979)

68% (1970)

62% (1956)

62% (1956)

56% (1976)

69% (1948)

67% (1959)

59% (1967)

63% (1925)

71% (1939)

62% (1940)

57% (1949)

64% (1966)

68% (1976)