; and (2) to purchase and maintain necessary vehicles and equipment for U.S. Border Patrol agents. (c) Limitation Not more than 5 percent of the funds deposited in the Secure the Southern Border Fund may be used for the purpose described in subsection (b)(2). . (b) Clerical amendment The table of contents for chapter 33 of title 31, United States Code, is amended by inserting at the end the following: 3344. Secure the Southern Border Fund. . 3. Border crossing accountability and security (a) Estimation of annual illegal border crossings Beginning with the first fiscal year that begins after the date of the enactment of this Act, not later than 30 days after the end of each fiscal year, the Secretary of Homeland Security shall determine and report to the Secretary of State and the Committees on the Judiciary of the House of Representatives and of the Senate— (1) the number of apprehensions that occurred during such fiscal year of aliens who entered the United States by illegally crossing the international land border between the United States and Mexico