These statistics are from an upcoming WOLA memo analyzing sharp recent changes in undocumented migration to the United States.

There was a lot of migration during the last quarter of 2016, especially children and families from Central America. And now there is a very sharp drop since mid-January.

As that WOLA memo will explain, both phenomena—the recent flood and the current drought—owe to a “Trump effect.” Still, there are strong reasons to believe that the current super-low level of migration is unlikely to continue. Stay tuned.

Fewest Monthly U.S.-Mexico Border Migrant Apprehensions on Record Since October 1999

  1. 12,193 – March 2017
  2. 18,754 – February 2017
  3. 18,983 – December 2011
  4. 19,429 – December 2010
  5. 21,514 – January 2015

Border Patrol Unaccompanied Child and Family Apprehensions at the U.S.-Mexico Border

    • October 2016 6,707 UCs (8th most of 54 months since October 2012) and 13,116 family-unit members (4th most)
    • November 2016 7,349 UCs (4th most) and 15,588 family-unit members (3rd most)
    • December 2016 7,190 UCs (5th most) and 16,139 family-unit members (2nd most)
    • January 2017 4,412 UCs (21st most) and 9,300 family-unit members (8th most)
    • February 2017 1,914 UCs (2nd least) and 3,124 family-unit members (26th least)
    • March 2017 1,043 UCs (least) and 1,125 family-unit members (6th least)