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June 4, 2004
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July 1, 2001
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May 1, 2000
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November 1, 1999
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January 3, 1999
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August 1, 1997
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September 16, 1996
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April 1, 1996
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August 4, 1995
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May 1, 1995
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May 1, 1995
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September 1, 1994
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February 1, 1994
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October 1, 1992
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September 16, 1992
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August 1, 1992
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November 1, 1991
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June 17, 1991
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October 1, 1990
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October 1, 1989
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June 28, 1989
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May 25, 1988
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April 15, 1985