Fast Facts & Figures About Social Security, 2005 - Text description for the bar chart "Social Security's unfunded obligation on January 1 of each year"

Present value of Social Security's unfunded obligation on January 1 of each year, 1999–2005 (in trillions of dollars)
Year	Unfunded obligation
1999	2.9
2000	2.9
2001	3.2
2002	3.3
2003	3.5
2004	3.7
2005	4.0
SOURCE: Social Security Administration, Office of the Chief Actuary.