I came across these figures for a Mises.org article. I hadn’t seen them reported:
The Federal Reserve Board on Monday announced preliminary unaudited results indicating that the Reserve Banks provided for payments of approximately $78.4 billion of their estimated 2010 net income of $80.9 billion to the U.S. Treasury. This represents a $31.0 billion increase in payments to the U.S. Treasury over 2009 ($47.4 billion of $53.4 billion of net income). The increase was due primarily to increased interest income earned on securities holdings during 2010.
There are other interesting stats at the link.