67% (1972)

61% (1971)

74% (2004)

60% (1988)

64% (1986)

60% (1955)

55% (1976)

65% (1953)

57% (1973)

58% (1973)

68% (1972)

67% (1959)

57% (1969)

59% (1947)

59% (1979)

55% (1970)

57% (1943)

61% (1950)

71% (1932)

49% (1967)