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14. Caribbean Banking Centers

U.S. debt holdings: $224.8 billion

The U.S. Treasury identifies this group as institutions in the Bahamas, Bermuda, the Cayman Islands, Netherlands Antilles, Panama and the British Virgin Islands. Holdings are currently listed at $224.8 billion, up from $106.6 billion in June 2008, but remains off the group's high of $226 billion in December 2011.

Photo: Wendy Twodolla