62% (1939)

63% (1977)

53% (2000)

49% (1978)

58% (1996)

70% (1939)

59% (1963)

55% (1987)

66% (1973)

69% (1970)

53% (1983)

65% (1980)

53% (1965)

70% (1943)

68% (1970)

62% (1983)

51% (1982)

63% (1976)

63% (1951)

63% (1964)