query: What is the public debt of the U.S.?
passage: National debt of the United States
As of December 31, 2018, debt held by the public was $16.1 trillion and intragovernmental holdings were $5.87 trillion, for a total or "National Debt" of $21.97 trillion.[5] Debt held by the public was approximately 76.4% of GDP in Q3 2018[6]. In 2017, the US debt-to-GDP ratio was ranked 43rd highest out of 207 countries.[7] The Congressional Budget Office forecast in April 2018 that the ratio will rise to nearly 100% by 2028, perhaps higher if current policies are extended beyond their scheduled expiration date.[8]
passage: Subprime mortgage crisis
The U.S. government continued to run large deficits post-crisis, with the national debt rising from $10.0 trillion as of September 2008 to $16.1 trillion by September 2012. The debt increases were $1.89 trillion in fiscal year 2009, $1.65 trillion in 2010, $1.23 trillion in 2011, and $1.26 trillion in 2012.