74% (1935)

51% (1992)

61% (1964)

69% (1933)

58% (1979)

61% (1940)

70% (1956)

65% (1973)

54% (1973)

56% (1956)

44% (1983)

57% (1979)

61% (1959)

68% (1949)

56% (1989)

42% (2009)

59% (1964)

64% (1970)

64% (1953)

56% (1989)