Distribution of Marketable Treasury Securities Outstanding (Fiscal Years 2001-2011) 											
End of Fiscal Year											
Percentage of marketable Treasury securities outstanding 											
	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011
Bills 	25.2%	27.8%	26.5%	25.0%	22.4%	21.2%	21.6%	28.5%	28.4%	21.0%	15.4%
Notes	49.2%	48.7%	52.0%	54.9%	57.3%	57.1%	55.5%	50.4%	54.0%	62.0%	66.7%
Bonds 	21.0%	19.0%	16.7%	14.4%	12.8%	12.5%	12.7%	11.1%	9.7%	10.0%	10.6%
TIPS	4.6%	4.4%	4.8%	5.8%	7.6%	9.2%	10.3%	10.1%	7.9%	7.0%	7.3%
											
Source : Department of the Treasury.											
Note: Data are audited by GAO. See Financial Audits of the Bureau of the Public Debt's Schedules of Federal Debt.