Tales of the Iraqi Resistance

Through September 22, 2007 approximately 19,429 insurgents/militia were reported to have been killed according to the U.S. military, including 1,309 bombers.[4]However according to the linked sources or articles 12,291 have been killed during that time period, excluding the suicide bombers. Another 2,362 have been killed since then as of March 11, 2008, excluding the bombers.
2008: 749
2007: 6,133 (according to the news sources 6,245 killed)
2006: 3,605 (according to the news sources 1,728 killed)
2005: 2,769 (according to the news sources 1,709 killed[5])
2004: 6,661 (according to the news sources 3,894 killed)
2003: 565 (according to the news sources 328 killed)
In addition as of March 16, 2008 approximately 1,464 suicide-bombers have also been reported killed, see full list.
2008
January 2008: 26
February 2008: 29
March 2008: 21
2007: 441
2006: 297
2005: 478
2004: 140
2003 (from August to December): 32
Grand total: 16,113-21,942 insurgent dead

Plus

[edit] 2008
January ---- Total: 596
320 Operation Phantom Phoenix
58 2008 Iraqi Day of Ashura fighting