Because IBC performs analyses (e.g., accounts for multiple reports, eliminates overlaps, etc.), there is always a delay between the date on which incidents occur and the addition of their numbers to the IBC database. Another factor is that some reports emerge weeks or even months later - for instance the emergence of Baghdad city morgue reports for 2005 in early 2006. The 6 December line above was taken from the IBC total as it stood on 6 December 2005, but the emergence of the morgue figures later increased IBC's figures for that period to 31,818–35,747.