Appendix of Tables

This residual foreign-born population is not an estimate of the number of unauthorized migrants. This estimate also includes people who are here legally but are not yet included in the official estimates of legal migrants and refugees. It also includes people in "quasi-legal" status who are awaiting action on their legal migration requests. Because the estimate was derived from a residual methodology, any limitations in the methods or in the measurement of other migration components are reflected in the residual number. In addition, our assumptions include a great deal of uncertainty, especially for small migration components. Therefore, the residual may be quite different from the actual number of unauthorized migrants.