58% (1990)

73% (1933)

55% (1992)

69% (1970)

73% (1947)

67% (1964)

56% (1996)

55% (1957)

62% (1988)

64% (1991)

64% (1986)

62% (1931)

68% (1988)

64% (1980)

55% (2001)

70% (1978)

73% (2010)

52% (1986)

72% (1956)

62% (1983)