WASHINGTON (MarketWatch) — The Federal Reserve announced on Monday it transferred a record $117 billion in earnings to the U.S. Treasury during 2015.

The transfer is nearly 21% more than the prior record of $96.9 billion, set in 2014.

The transfer includes $97.7 billion in remittances, a side benefit of the U.S. central bank’s earnings from its massive bond-buying purchases. The Fed’s balance sheet now totals $4.5 trillion.