I mashed together data from the Department of Homeland Security Office of Homeland Security Statistics and from Customs and Border Protection to make this chart of the past 11 years’ Border Patrol apprehensions of migrants, by country.

Here’s the underlying data table, with statistics from 101 countries (note that OHSS does some rounding to the nearest 10).

A few things about what you see here:

• This is just Border Patrol apprehensions: migrants caught out in the open areas between the official border crossings (ports of entry). I only have CBP port of entry data by country (which is smaller until very recently), for just 21 countries and a big “other” category, going back to October 2019.
• Note how 10 months of the Trump administration (2017-2020) saw more migration than October 2024 (56,530 migrant apprehensions).
• Note how the migrant population was almost completely Mexican, Salvadoran, Guatemalan, and Honduran before the pandemic, and far more diverse after it.
• You can see the early 2024 drop resulting from Mexico’s ongoing crackdown on migrants trying to transit its territory, and then a further mid-2024 drop resulting from the Biden administration’s ban on nearly all asylum access for people who cross between the border’s ports of entry.