I doubt we will ever know the numbers because black people were not considered ‘people’ enough to keep track. Also, the numbers of African Americans killed by the policies which enforce inequality are also part of this: the inequality being enforced cushions white people at the expense of all POC, but in particular at the expense of black people because the residual effects of slavery are still very active: that is, they still allow a place for white mediocrity to place its heavy foot and lift itself falsely in the absence of actual achievement.
For example, the COVID19 death rate that we see in African Americans is a result of the legacy of the TransAtlantic Slave Trade. These numbers aren’t counted, but in fact they are the result of shifting financial resources from black to white and the very hard work white people do, collectively, to maintain that imbalance, which is perceptible at both gross and minute levels.
The numbers are astronomical, and the people still subject to discrimination part of it. We’re still a white supremacist society. White bodies will matter more until we are truly equal, and very few white people are the least bit interested in true equality if it means reality: shifting resources back to African Americans from white people who act as if ‘slavery is over.’
Their continued aggressive attachment to self-deception in the service of not returning resources is the largest barrier we have now, and that barrier is white self deception, a collective psychosis.