$ 20 mil millones de dólares GAO Collected Research on NFIP (2013) $23 billion in debt to the U.S. Treasury $23 billion in debt to the U.S. Treasury $20 billion in debt $20 billion $30 billion $20 billion $23 billion in debt to the U.S. Treasury GAO Collected Research on NFIP (2013) $ 20 mil millones de dólares $23 billion in debt to the U.S. Treasury nsolvency massive debt according to the Government Accountability Office GAO Collected Research on NFIP (2013) $23 billion in debt to the U.S. Treasury $23 billion in debt to the U.S. Treasury