From the Summary: "This report presents various governmental and nongovernmental estimates of Iraqi civilian fatalities. The Department of Defense (DOD) regularly updates total U.S. military death and wounded statistics from Operation Iraqi Freedom (OIF), as reflected in CRS [Congressional Research Service] Report RS21578, 'Iraq: Summary of U.S. Casualties'. However, no Iraqi or U.S. government office regularly releases statistics on Iraqi civilian deaths. Statistics on Iraqi civilian deaths are sometimes available through alternative sources, such as nonprofit organizations, or through statements made by officials to the press. Since the start of the U.S.-led 'troop surge,' or Operation 'Fardh al-Qanoon' (FAQ), on February 14, 2007, a number of sources have released estimates of monthly, rather than annual or total, Iraqi civilian deaths. This report has therefore been split into two sections: estimates of total or annual Iraqi deaths and estimates of post-Operation FAQ Iraqi civilian deaths. Because these estimates are based on varying time periods and have been created using differing methodologies, readers should exercise caution when using these statistics and should look on them as guideposts rather than as statements of fact. See also CRS Report RS22532, 'Iraqi Police and Security Forces Casualty Estimates'. This report will be updated as needed."
CRS Report for Congress, RS22537