Well, yeah.
> Current estimates are that about 12 million to 12.8 million Africans were shipped across the Atlantic over a span of 400 years. The number purchased by the traders was considerably higher, as the passage had a high death rate with approximately 1.2–2.4 million dying during the voyage and millions more died in seasoning camps in the Caribbean after arrival to the New World. Millions of slaves also died as a result of slave raids, wars and during transport to the coast for sale to European slave traders.