42% (1988)

41% (1979)

66% (2009)

50% (1962)

45% (1956)

65% (1951)

45% (1964)

48% (1970)

51% (1965)

48% (1971)

47% (1990)

43% (1957)

50% (1974)

50% (1962)

50% (1949)

45% (1958)

50% (1984)

46% (1985)

50% (1956)

63% (1961)