"Figure 5: Number of Highway Bridges Categorized as Structurally Deficient, 1992-2006",
Year,Structurally Deficient (Thousands)
1992,118.70
1993,111.51
1994,107.48
1995,103.92
1996,101.52
1997,98.48
1998,93.08
1999,88.15
2000,86.69
2001,83.63
2002,81.44
2003,79.81
2004,77.76
2005,75.87
2006,73.76,
"NOTE: Bridges that are both structurally deficient and functionally obsolete are classified as structurally deficient.  Numbers include the 50 U.S. states, the District of Columbia, and Puerto Rico.",,
"SOURCES: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory, Deficient Bridges by State and Highway System, various years, available at http://www.fhwa.dot.gov/bridge/britab.htm as of Aug. 14, 2007.",,