Nearly 46 million people living in the US were born in other countries. A new map from the Pew Research Center helps track where all those people originated:

At nearly 13 million migrants, Mexico easily takes the top spot for origin countries. After that, southeast Asia dominates: China (2.2 million), India (2 million), and the Philippines (2 million) take second, third, and fourth place.

That's only a small part of all the information compiled by Pew, though. The full interactive map on Pew's page lets you compare migrants in and out of every country during four different periods (1990, 2000, 2010, and 2013). It's really worth checking out in its entirety.