Counting the Immigrants     

   1.2 million lawful permanent residents via green card, 2000-2016

   1.9 million illegal border crossings in fiscal year 2000 
         1.5 million in 2005 
         1 million in 2007
         0.5 million in 2010
         170,000 illegal border crossings in fiscal year 2016 

   10-20 percent additional illegal entries each year via checkpoints or smuggling

    ~ 628,799 people who overstayed visas in fiscal year 2016 

    Visa overstays account for about two-thirds of the undocumented population in any given year. 

    Sources:

Dept. of Homeland Security

Institute for Defense Analyses, DHS

Center for Migration Studies