57% (1976)

64% (1988)

70% (1939)

66% (1976)

60% (1967)

70% (1937)

70% (1972)

57% (1988)

71% (2001)

59% (1983)

72% (1966)

75% (1975)

63% (1946)

68% (1960)

69% (1973)

56% (1977)

67% (1995)

79% (1982)

71% (1977)

59% (1958)