51% (1977)

61% (2003)

45% (1979)

64% (1988)

62% (1941)

58% (1965)

59% (1934)

58% (1963)

39% (1983)

64% (1934)

49% (1986)

58% (1959)

51% (1960)

61% (1936)

68% (1949)

56% (1964)

61% (1941)

66% (1941)

55% (1954)

57% (2002)