I was listening to an episode of Behind the Bastards about the slave labor used by Volkswagen in the 1970s and 1980s and this fact came up. Here’s the relevant Wiki:

https://en.wikipedia.org/wiki/Slavery_in_Brazil

Excerpt:

Out of the 12 million Africans who were forcibly brought to the New World, approximately 5.5 million were brought to Brazil between 1540 and the 1860s.