Iraq by the numbers: key figures since the war began in 2003

U.S. TROOP LEVELS:

--October 2007: 170,000, peak of troop buildup.

--April 2008: 159,000

CASUALTIES:

--Confirmed U.S. military deaths as of April 2008: at least 4,059.

--Confirmed U.S. military wounded (hostile) as of May 1, 2008: 29,911.

--Confirmed U.S. military wounded (non-hostile, using medical air transport) as of April 5, 2008: 31,962.

--U.S. military deaths for April 2008: 52.

--Deaths of civilian employees of U.S. government contractors as of Dec. 31, 2007, most recent figure available: 1,123.

--Iraqi deaths in April from war-related violence: 1,080, or an average of 36 a day, according to an AP tally. That's down from March's total of 1,269, but trending upwards from the relative low in January of at least 610 killed.

--Assassinated Iraqi academics: 356.

--Journalists killed on assignment: 127.

COST:

--Nearly $516 billion so far, according to the National Priorities Project.

OIL PRODUCTION:

--Prewar: 2.58 million barrels per day.

--April 20, 2008: 2.22 million barrels per day.

ELECTRICITY:

--Prewar nationwide: 3,958 megawatts. Hours per day (estimated): 4-8.

--April 15, 2008 nationwide: 4,100 megawatts. Hours per day: N/A.

--Prewar Baghdad: 2,500 megawatts. Hours per day (estimated): 16-24.

--April 15, 2008 Baghdad: Megawatts not available. Hours per day: N/A.

--Note: Current Baghdad megawatt figures are no longer reported by the U.S. State Department's Iraq Weekly Status Report.

TELEPHONES:

--Prewar land lines: 833,000.

--March 13, 2007: 1,111,000.

--Prewar cell phones: 80,000.

--Jan. 30, 2008: Approximately 10,000,000.

WATER:

--Prewar: 12.9 million people had potable water.

--Jan. 20, 2008: 20.4 million people have potable water.

SEWERAGE:

--Prewar: 6.2 million people served.

--Jan. 20, 2008: 11.3 million people served.

INTERNAL REFUGEES:

--April 29, 2008: At least 2.7 million people are currently displaced inside Iraq.

EMIGRANTS:

--Prewar: 500,000 Iraqis living abroad.

--April 29, 2008: Some 2 million, mainly Syria and Jordan.

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All figures are the most recent available.

Sources: The Associated Press, State Department, Defense Department, Special Inspector General for Iraq Reconstruction, The Brookings Institution, Iraq Body Count, U.N. High Commission for Refugees, Internally Displaced Persons (IDP) Working Group, Committee to Protect Journalists, National Priorities Project, The Brussels Tribunal, Department of Labor.

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AP researchers Julie Reed and Rhonda Shafner in New York compiled this report.