76% (1959)

80% (1974)

64% (1962)

50% (1955)

56% (1956)

74% (1984)

53% (1949)

74% (1951)

61% (1993)

68% (1950)

65% (1966)

0% (1980)

80% (1963)

79% (1950)

61% (1997)

65% (1960)

79% (1972)

74% (1965)

60% (1956)

62% (1958)