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February 2, 1950
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April 10, 1952
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March 25, 1956
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September 1, 1954
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May 28, 1958
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March 19, 1959
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June 22, 1960
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March 28, 1963
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December 5, 1963
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April 7, 1966
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December 20, 1971
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December 15, 1974
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May 25, 1977
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March 21, 1980
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April 25, 1979
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August 17, 1979
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December 19, 1979
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May 21, 1980
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June 16, 1980
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June 12, 1981
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June 3, 1983
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December 18, 1985
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July 2, 1986
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July 15, 1988
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July 12, 1989
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March 8, 1996
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February 2, 2001
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March 19, 2004