51% (2003)

39% (1985)

58% (1948)

73% (1964)

48% (1983)

57% (1929)

55% (1956)

72% (1936)

62% (1955)

54% (1970)

56% (1959)

59% (1974)

61% (1953)

59% (1958)

62% (1947)

72% (1926)

66% (1967)

36% (1979)

62% (1940)

60% (1963)