64% (1983)

64% (1987)

75% (1972)

61% (1996)

67% (1936)

63% (1965)

64% (1958)

63% (1964)

64% (1930)

70% (1968)

65% (1980)

57% (1991)

72% (1975)

68% (1999)

62% (2005)

56% (1992)

63% (1964)

73% (1964)

55% (1998)

51% (1995)