Like opposing tribes that captured and sold most of the slaves. Most of which did NOT come to the US. And how about the fact that thousands of non POC were captured and made slaves. Guess that doesn’t count. Good map link:
https://slavevoyages.org/static/images/assessment/intro-maps/09.jpg
"Within 30 years the colony of Rhode Island, and in particular Newport, came to dominate the North American slave trade. Even though it was the smallest of the colonies, the great majority of slave ships leaving British North America came from Rhode Island ports. Historian Christy Clark-Pujara, in her book Dark Work, The Business of Slavery in Rhode Island, indicates that during “the colonial period in total, Rhode Island sent 514 slave ships to the coast of West Africa, while the rest of the colonists sent just 189.”
http://smallstatebighistory.com/rhode-island-dominates-north-american-slave-trade-in-18th-century/
