"The BEP prints billions of dollars - referred to as Federal Reserve notes - each year for delivery to the Federal Reserve System. U.S. currency is used as a medium of exchange and store of value around the world. According to the Federal Reserve, there is more than $2 trillion worth of Federal Reserve notes in circulation. Currency production is not an easy or simple task, but one that involves highly trained and skilled craftspeople, specialized equipment, and a combination of traditional old world printing techniques merged with sophisticated, cutting edge technology." https://www.bep.gov/currency