Just how many immigrant apprehensions occur at the U.S./Mexico border?

The U.S. Customs and Border Protection agency lists statistics for two types of apprehensions at the southwest U.S. border, unaccompanied children and "family units".

A family unit is described by the agency as "the number of individuals (either a child under 18 years old, parent or legal guardian) apprehended with a family member by the U.S. Border Patrol."

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In total, 157,248 unaccompanied children and family unit apprehensions occurred during fiscal year 2018. This number has greatly increased from the previous fiscal year, which totaled 117,057 apprehensions.

The Arizona border with Mexico accounts for just under 20 percent of the U.S./Mexico border, and the Tucson and Yuma sectors combined account for just under 20 percent of the total apprehensions in FY2018. The full length of the border spans just under 2,000 miles.

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The most recently listed apprehensions by sector are from November 2018. A total of 9,595 apprehensions occurred at the Tucson and Yuma sectors in that month.

Click on each point in the map below to see each border sector's breakout of apprehensions for fiscal year 2018. Locations of each border sector are approximate.

Due to the partial federal government shutdown, the U.S. Customs and Border Protection website has not been updated since December 21, 2018, according to a posting on the site.