U.S. TROOP LEVELS:
_October 2007: 170,000 at peak of troop buildup.
_Sept. 30, 2009: 124,000
_Confirmed U.S. military deaths as of Oct. 1, 2009: at least 4,346.
_Confirmed U.S. military wounded (hostile) as of Sept. 30, 2009: 31,514.
_Confirmed U.S. military wounded (non-hostile, using medical air transport) as of Sept. 5, 2009: 38,593.
_U.S. military deaths for September 2009: 10, the fourth lowest number since the war began in March 2003.
_Deaths of civilian employees of U.S. government contractors as of June 30, 2009: 1,395.
_Iraqi deaths in Sept. 2009 from war-related violence: at least 238, a sharp drop from last month's 425. September was the second least deadly month for Iraqis since the AP began tracking casualties in May 2005.
_Assassinated Iraqi academics as of Sept. 18, 2009: 431.
_Journalists killed on assignment as of Oct. 1, 2009: 139.
_Over $687 billion, according to the National Priorities Project.
_Prewar: 2.58 million barrels per day.
_Sept. 23, 2009: 2.49 million barrels per day.
_Prewar nationwide: 3,958 megawatts. Hours per day (estimated): 4-8.
_Sept. 15, 2009, nationwide: 6,475 megawatts. Hours per day: 13.8.
_Prewar Baghdad: 2,500 megawatts. Hours per day: 16-24.
_Sept. 15, 2009, Baghdad: N/A. Hours per day: 13.4.
_Prewar land lines: 833,000.
_July 30, 2009: 1,200,000.
_Prewar cell phones: 80,000.
_July 30, 2009: an estimated 17.7 million.
_Prewar: 12.9 million people had potable water.
_July 30, 2009: 21.2 million people have potable water.
_Prewar: 6.2 million people served.
_July 30, 2009: 11.3 million people served.
_September 2009: at least 2,764,111 are currently displaced inside Iraq.
_Prewar: 500,000 Iraqis living abroad.
_September 2009: more than 1.5 million.
All figures are the most recent available.
Sources: The Associated Press, State Department, Defense Department, Special Inspector General for Iraq Reconstruction, The Brookings Institution, U.N. High Commissioner for Refugees, Committee to Protect Journalists, National Priorities Project, The Brussels Tribunal, and the U.S. Department of Labor.
AP news researchers Julie Reed and Rhonda Shafner compiled this report.
By: Iraq: Key figures since the war began