From CSIS External Relations <[email protected]>
Subject By The Numbers: U.S. Naval Shipbuilding, Russia's Shadow Fleet, Drone Incursions from Mexico, and More
Date December 21, 2025 4:05 PM
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Each week, we'll share with you some of the most compelling numbers in our studies.

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1.1

The United States has struggled to maintain its shipbuilding industrial base. Submarine production has been particularly constrained; while the Navy has aimed to procure two Virginia-class attack submarines per year since FY 2011, current production stands at only around 1.1 per year.



SOURCE: "Outlining the Challenges to U.S. Naval Shipbuilding" by CSIS's Seamus P. Daniels, Henry H. Carroll, Cynthia R. Cook, Oliver Buntin, and Sarah O’Rourke.

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$100 billion

Russia's shadow fleet generates up to an estimated $100 billion in revenue per year—matching, if not exceeding, the total value of economic and military assistance provided to Ukraine since the start of the war.



SOURCE: "Ghost Busters: Options for Breaking Russia’s Shadow Fleet" by CSIS's Benjamin Jensen and Jose M. Macias III.

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1,000

In 2024, U.S. Northern Command reported that approximately 1,000 drone incursions a month were coming from Mexico into the United States.



SOURCE: "The United States Needs a Southwest Drone Wall" by CSIS's Henry Ziemer.

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$10 trillion

Subsea cables are vital to transmitting data and connecting international markets. Over $10 trillion in daily financial transactions travels globally across these cables.



SOURCE: "Protecting Subsea Cables: Detect to Deter, Sue to Secure" by CSIS's Joel Coito.

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By the Numbers is composed weekly by Lauren Adler and the External Relations team.

The Center for Strategic and International Studies (CSIS) is a bipartisan, nonprofit organization founded in 1962 and headquartered in Washington, D.C. It seeks to advance global security and prosperity by providing strategic insights and policy solutions to decisionmakers.

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