CPB has posted border apprehensions for the last quarter of 2016.
Quote from the CPB report:
U.S. Customs and Border Protection saw a dip in arrivals along the Southwest Border in December, although overall total migration remained at elevated levels, primarily due to family units and unaccompanied children from Central America, Haitian nationals migrating from Brazil, and Cuban nationals. CBP continues to maintain a strong security posture through background checks of all individuals encountered and ensures that each person is processed in accordance with U.S. immigration laws and DHS policy.
In response to the increased number of individuals apprehended between ports of entry or encountered at ports of entry, CBP opened temporary holding facilities in Tornillo and Donna, Texas, in November 2016 capable of holding 500 people each. The facilities are available to provide additional space for those in CBP custody awaiting transfer to U.S. Immigration and Customs Enforcement for processing, detention, and/or removal, or to the Department of Health and Human Services.