"Only 42.1 percent of the “deportable aliens” that the U.S. Border Patrol apprehended along the U.S.-Mexico border in fiscal 2017 were citizens of Mexico, according to data collected by U.S. Customs and Border Protection.
A significant majority—57.9 percent—came from 111 other countries.
In fact, during fiscal year 2017, the Border Patrol apprehended deportable aliens along the U.S.-Mexico border who came from 84 countries that are not in the Americas."