60% (1955)

65% (1971)

73% (1971)

68% (1944)

51% (1992)

56% (1984)

49% (2003)

67% (1983)

60% (1965)

57% (1972)

63% (1964)

63% (1956)

43% (1990)

62% (1985)

56% (1994)

64% (1970)

47% (1993)

61% (1949)

47% (1986)

48% (1957)