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October 31, 2006
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January 10, 2006
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April 1, 2005
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January 22, 2003
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October 1, 2002
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October 1, 2002
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July 1, 2002
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August 1, 2001
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June 1, 2001
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April 1, 2001
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September 1, 2000
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November 9, 1999
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November 1, 1999
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April 14, 1999
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September 9, 1998
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October 1, 1997
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February 1, 1997
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October 24, 1996
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September 1, 1995
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June 1, 1995
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March 1, 1995
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July 1, 1994
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June 1, 1994
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January 1, 1994
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November 1, 1993
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November 1, 1993
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July 15, 1993
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April 1, 1993
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December 1, 1992
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January 1, 1992
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November 1, 1991
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March 25, 1991
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July 17, 1990
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November 24, 1989
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March 31, 1989
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May 19, 1986
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December 1, 1984
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April 18, 1979
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April 26, 1978
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December 5, 1977
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September 1, 1976
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August 18, 1976
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May 1, 1976
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October 12, 1975
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September 1, 1975
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March 20, 1975
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March 20, 1975
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January 3, 1975
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September 10, 1974
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September 1, 1974
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September 7, 1973
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April 18, 1973
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April 16, 1973
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September 8, 1972
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June 6, 1972
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April 23, 1972
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September 1, 1971
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April 1, 1971
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September 1, 1970
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October 29, 1969
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April 14, 1969
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March 1, 1968
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May 15, 1967
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September 14, 1966
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August 1, 1966
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August 25, 1965
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August 1, 1964
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April 1, 1963
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September 26, 1962
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September 24, 1962
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September 1, 1961
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April 28, 1961
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October 12, 1960
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October 19, 1959
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August 19, 1959
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October 7, 1958
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August 20, 1958
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August 1, 1957
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May 11, 1957
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August 1, 1956
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January 1, 1956
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August 1, 1955
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March 14, 1955
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September 1, 1954
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August 16, 1954
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June 15, 1954
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August 20, 1953
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August 21, 1952
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June 15, 1951
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October 6, 1949
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June 15, 1948
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June 3, 1947
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March 21, 1944
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September 10, 1942
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June 15, 1934