26 pages. Excerpt: This report [presents] the agency's latest long-term Social Security projections, which differ slightly from the earlier results because of newly available data, updated assumptions, and improved modeling. Such long-term projections are necessarily uncertain, but the general conclusions presented in this report hold true under a wide range of assumptions .... [Supplemental data is at http://www.cbo.gov/ftpdocs/72xx/doc7289/06-14-SupplementalData.xls.]