Since 2010, there was a sharp decrease in the number of unauthorized Mexicans entering the US. Between 2007 and 2016, unauthorized immigration declined by 1.5 million, according to a study by the Pew Research Center. This drop was tied to the 2008 recession, which wiped out millions of jobs that attracted undocumented immigrants to the United States. Their economy improved, reducing the drive for many migrants to leave their home country in search of work. More Mexicans returned to their home country between 2009-2014 than entered the United States, a historic shift, according to a 2015 Pew study.
“For the last few decades, the most common origin country of immigrants has been Mexico, contributing both legal and unauthorized immigrants. One of the big drivers in the downward trend in international migration has been that Mexico is not contributing as many migrants as it once was.”