How do I rank newer items higher in Indexing Service search results?

Question

For searching our internal Intranet, we use Windows Indexing Service (Server 2003) with a query similar to this:

SELECT FILENAME, RANK
FROM SCOPE()
WHERE CONTAINS ('"Management" AND "Meeting"')
ORDER BY RANK DESC

What we'd like to do though is weight newer documents higher (their rank) than older documents. How would one go about doing this?