Credit unions in the United States serve 100 million members, comprising 43.7% of the economically active population. U.S. credit unions are not-for-profit, cooperative, tax-exempt organizations. As of March 2016, the largest American credit union was Navy Federal Credit Union, serving U.S. Department of Defense employees, contractors, and families of servicepeople, with over $75 billion USD in assets and over 6.1 million members. Total credit union assets in the U.S. reached $1 trillion as of March 2012. Approximately 236,056 people were directly employed by credit unions per data derived from the 2012 NCUA Credit Union Directory.