Additionally, Mexican authorities have deported more than 64,000 of the estimated 69,000 adults that have been detained along their southern border this year.

Those numbers stand in stark contrast to the deportation of minor immigrants from the United States: None of the more than 60,000 Central American minors detained this year have been deported.

According to a Department of Homeland Security spokesman, those minors — who are estimated to total as many as 90,000 by year’s end — must first make their way through the legal system, which has seen significant backlogs, because they qualify to apply for asylum status.