An unprecedented number are now from Central America. In FY 2004, 83 percent were Mexican. So far in FY 2014, just 24 percent were from Mexico, according to the Bipartisan Policy Center.
The biggest flood of unaccompanied children has occurred in the Rio Grande, Texas, border sector. Between FY 2013 and 2014, about 93 percent of the increase in apprehensions has taken place there.