U.S. Doesn't Know How Many Foreign Visitors Overstay Visas - The ...

https://www.nytimes.com/.../us/.../us-doesnt-know-how-many-foreign-visitors-overstay-...
Jan 1, 2016 - One widely cited statistic, from a 1997 report by the Immigration and Naturalization Service, puts the number of people who overstay their visas at 40 percent — which now would mean about 4.4 million of the estimated 11 million undocumented residents in the United States.