_October 2007: 170,000 at peak of troop buildup.
_December 2008: 145,000.
_Confirmed U.S. military deaths as of Jan. 2, 2009: At least 4,219.
_Confirmed U.S. military wounded (hostile) as of Dec. 31, 2008: 30,920.
_Confirmed U.S. military wounded (non-hostile, using medical air transport) as of Dec. 6, 2008: 35,141.
_U.S. military deaths for December 2008: 14
_Deaths of civilian employees of U.S. government contractors as of Sept 30, 2008: 1,264.
_Iraqi deaths in December 2008 from war-related violence: 393, up from November 2008, which at 360 was the lowest number of civilian casualties reported in one month since the AP began tracking them in May 2005.
_Assassinated Iraqi academics as of Dec. 21, 2008: 410.
_Journalists killed on assignment as of Jan. 2, 2009: 136.
_Nearly $585 billion so far, according to the National Priorities Project.
_Prewar: 2.58 million barrels per day.
_Dec. 14, 2008: 2.40 million barrels per day.
_Prewar nationwide: 3,958 megawatts. Hours per day (estimated): 4-8.
_Dec. 9, 2008 nationwide: 4,740 megawatts. Hours per day: 14.1.
_Prewar Baghdad: 2,500 megawatts. Hours per day (estimated): 16-24.
_Dec. 9, 2008 Baghdad: Megawatts not available. Hours per day: 14.3.
Note: Current Baghdad megawatt figures are no longer reported by the U.S. State Department's Iraq Weekly Status Report.
_Prewar land lines: 833,000.
_Oct. 2, 2008: 1,300,000.
_Prewar cell phones: 80,000.
_Oct. 2, 2008: 13.4 million.
_Prewar: 12.9 million people had potable water.
_Oct. 2, 2008: 20.9 million people have potable water.
_Prewar: 6.2 million people served.
_Oct. 2, 2008: 11.3 million people served.
_Nov. 27, 2008: At least 2.4 million people are currently displaced inside Iraq.
_Prewar: 500,000 Iraqis living abroad.
_Nov. 25, 2008: Close to 2 million mainly in Syria and Jordan.
All figures are the most recent available.
The Office of the UN High Commissioner for Refugees (UNHCR) announced in late November that it had reached a milestone: exactly 50,000 Iraqi refugees had submitted for resettlement from host countries in the Middle East. Some refugees will not be able to return to Iraq and cannot, or will not, remain in host countries, according to UNHCR.
Sources: The Associated Press, State Department, Defense Department, Special Inspector General for Iraq Reconstruction, The Brookings Institution, Refugees International, Office of the UN High Commissioner for Refugees, International Organization for Migration, Committee to Protect Journalists, National Priorities Project, The Brussels Tribunal, Department of Labor.
AP researchers Julie Reed and Rhonda Shafner in New York compiled this report.