61% (1973)

63% (1967)

71% (1970)

63% (1966)

73% (1937)

57% (1988)

64% (1959)

69% (1983)

63% (1957)

40% (2002)

60% (1999)

60% (1956)

56% (1998)

71% (1933)

49% (1997)

49% (1983)

50% (1971)

55% (1988)

63% (1984)

57% (1989)