"This Office of Immigration Statistics Fact Sheet provides definitions for terms related to legal permanent residents (LPRs) and descriptive characteristics of persons who became diversity LPRs in the United States during 2004. The data presented in this fact sheet were derived from approved applications for LPR status that are maintained in the Computer Linked Application Information Management System (CLAIMS) of the U.S. Citizenship and Immigration Services (USCIS) of the Department of Homeland Security."
U.S. Citizenship and Immigration Services: http://uscis.gov/graphics/index.htm