"CBO has updated the information in its June 2011 report A Description of the Immigrant Population: An Update. CBO updated 15 of the 20 exhibits contained in that report and added one new exhibit. Those exhibits that could be updated in their entirety have been, and a few others have been updated partially. In some instances, the period covered was altered to focus on the time span since the previous report. CBO’s updated exhibits regarding the immigrant population, along with a list of the agency’s recent reports and selected recent cost estimates for legislation related to immigration, accompany a letter to Congressman Paul Ryan, who requested the update. Five of the updated exhibits are highlighted below with captions describing some of the information they present." - CBO, May 8, 2013.