"Percent Change in National Debt" as a percent change in public debt "Percent Change in National Debt" U.S. national debt has increased by $7.4 trillion "Percent Change in National Debt" "Percent Change in National Debt" "Percent Change in National Debt" One of the largest net changes in debt "Percent Change in National Debt" maggiori aumenti del debito pubblico "Percent Change in National Debt" The national debt was $10.6T on January 20, 2009 "Percent Change in National Debt" "Percent Change in National Debt" "Percent Change in National Debt" "Percent Change in National Debt" "Percent Change in National Debt" climbed by almost $9 trillion rises in public debt as a percent change in public debt "Percent Change in National Debt" "Percent Change in National Debt" "Percent Change in National Debt" "Percent Change in National Debt" maggiori aumenti del debito pubblico "Percent Change in National Debt" "Percent Change in National Debt" One of the largest net changes in debt The national debt was $10.6T on January 20, 2009 "Percent Change in National Debt" "Percent Change in National Debt" climbed by almost $9 trillion while in office "Percent Change in National Debt" The national debt was $10.6T on January 20, 2009 "Percent Change in National Debt"