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  +--------+------------+------------+
  | name   | begin      | end        |
...
  +--------+------------+------------+
  | Dec    | 2003-12-01 | 2003-12-30 |
  +--------+------------+------------+

  SELECT contacts.state, bucket.name, count(*)
  FROM   contacts, bucket
  WHERE  contacts.indentifer BETWEEN bucket.begin AND bucket.end
  GROUP BY bucket.name, contacts.state
  ORDER BY contacts.state

  +--------+------------+------------+
  | name   | begin      | end        |
...
  +--------+------------+------------+
  | 4Q03   | 2003-10-01 | 2003-12-30 |
  +--------+------------+------------+