score:18
Iraqi Body Count maintains an online database of incidents with analysis as to the cause of the deaths reported.
The link provided allows you to select the various actors who have been determined by their analysis to be responsible for the deaths. Selecting just those deaths directly determined to be due to the actions of the US-led coalition, the total from 2003 until 2016 is 14,338. This is out of a total of perhaps 181,337 total civilian deaths.
Note that most of the coalition related civilian deaths occurred during the active period of the war, the first two months: over 7,000 civilian deaths.
The incident database documents each incident recorded.
Their methodology is described here.