71% (1940)

59% (1980)

59% (1984)

52% (1987)

71% (1941)

55% (1980)

49% (1996)

68% (2003)

52% (1987)

56% (1988)

70% (1955)

60% (1997)

71% (1981)

59% (1947)

62% (1996)

62% (1936)

73% (1942)

64% (1990)

57% (1999)

59% (1971)