Jaw
It's OVER 5,000!
There are certain groups of Africans that do quite well in American society.
Nigerian Americans for example.
https://medium.com/@joecarleton/why.... immigrant groups, including Asian-Americans.
Genetically they are more African than African-Americans.
It is also widely known that immigrants (and their first generation offspring) are special in various ways. They are a highly self-selected group.
I think someone interested in doing a study of racism would do well to compare second generation Nigerian Americans with other second generation groups (Koreans, Irish, etc) whose first generations are similar in various ways (education, etc). See how they compare in terms of income, education, incarceration, etc.
I suspect that second generation Americans of any race or ethnicity would outperform whites, blacks, and hispanics from families that have been here for several years. That suspicion is based on my belief that the primary problem of underperforming Americans is the culture they come from, not their skin color.