Average Money Market Rates

The average annual rate would be a table with monthly averages from 1990 to 2006 would be even better. I've been researching Google and Yahoo and have partial information. Thank you in advance for your help.

St. Louis Fed maintains a large database. Although it does not (if I remember "money market" rates, it has the rates for TBills, which is a very good proxy)
http://research.stlouisfed.org/fred2/cat ...
Another source for finding financial and economic data
http://www.economy.com/freelunch/default ...