* The number of births to Illinois residents for 2011, 2012 and 2013 are taken from the “Provisional Number of Births by County” table on the “Health Statistics” Web page, and are tallies from the IDPH birth registration system as of July 15, 2014. In general, the tallies for the most recent provisional periods are less accurate than the eventual final numbers, since birth reporting and record clean-up processes may be incomplete prior to each annual file being closed for statistical purposes.