: US Treasury. i USA Inc. | Income Statement Drilldown 165 Effective Interest Rates: If Debt Levels & Interest Rates Rise Dramatically Beyond 2010, Net Interest Payments Could Soar... USA Federal Net Debt Outstanding / Effective Interest Rates / Net Interest Payments, 2009 — 2016E 11-16E 2009 2010 2011E 2012E 2013E 2014E 2015E