[Excerpt] This document updates the Congressional Budget Offices (CBO's) February 2006 paper Immigration Policy in the United States. It presents data through 2009 on permanent and temporary admissions of foreign nationals to the United States, the number and types of visas issued, the naturalization of residents, and enforcement of immigration laws—and makes comparisons with 2004, which was the most recent year for which most data were reported in the earlier paper. In keeping with CBO's mandate to provide objective, impartial analysis, this document does not make any recommendations.