Reflecting broad changes in their social and economic status, women around the world have been migrating more in recent decades and as a result have constituted an increasing share of migrant populations almost everywhere.
Nearly half of all the unauthorized migrants now living in the United States entered the country legally through a port of entry such as an airport or a border crossing point where they were subject to inspection by immigration officials.
This fact sheet presents estimates for the number of unauthorized migrants living in the 50 states and the District of Columbia based on a well-established methodology applied to data from the March 2005 Current Population Survey.
The study was conducted for Pew Hispanic Center via telephone by International Communications Research, an independent research company.
Strict requirements, insufficient information about registration procedures and lack of public interest hobbled Mexico's first effort to conduct absentee voting among its more than ten million adult citizens living in the United States.