65% (1967)

48% (2002)

66% (1991)

58% (1999)

63% (1995)

62% (1990)

66% (1970)

63% (1960)

53% (2000)

74% (1932)

54% (1999)

51% (1995)

66% (2002)

63% (1951)

59% (1981)

50% (1988)

61% (1955)

74% (1940)

63% (1997)

67% (1985)