61% (1945)

70% (1965)

56% (1984)

62% (1931)

57% (1998)

66% (1975)

71% (1970)

66% (1977)

66% (1949)

70% (1950)

72% (1954)

65% (1938)

52% (1982)

71% (1949)

56% (2001)

62% (1981)

52% (2008)

59% (1983)

71% (2001)

75% (1950)