+--------+------------+------------+
  | name   | begin      | end        |
  +--------+------------+------------+
  | Jan    | 2003-01-01 | 2003-01-31 |
  +--------+------------+------------+
  | ...                              |
  +--------+------------+------------+
  | Dec    | 2003-12-01 | 2003-12-30 |
  +--------+------------+------------+

##</code><code>##

  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

##</code><code>##

  +--------+------------+------------+
  | name   | begin      | end        |
  +--------+------------+------------+
  | 1Q03   | 2003-01-01 | 2003-03-31 |
  +--------+------------+------------+
  | ...                              |
  +--------+------------+------------+
  | 4Q03   | 2003-10-01 | 2003-12-30 |
  +--------+------------+------------+