This document is the 2008 version of the United States Department of Homeland Security, Office of Immigration Statistics' annual yearbook of immigration statistics. "Statistical data on immigration have been published annually by the U.S. government since the 1890s. Over the years, the federal agencies responsible for reporting on immigration have changed, as have the content, format, and title of the annual publication. Currently, immigration data are published in the Yearbook of Immigration Statistics by the Office of Immigration Statistics in the Policy Directorate of the Department of Homeland Security. The 2008 Yearbook of Immigration Statistics consists of a compendium of tables organized by subject matter, including Legal Permanent Residents, Refugees and Asylees, Naturalizations, Nonimmigrant Admissions, and Enforcement Actions. The data presented in the 2008 Yearbook were obtained primarily from workload and case tracking systems of the U.S. Department of Homeland Security."
United States Department of Homeland Security: http://www.dhs.gov/