Where can I find a graph or table that shows when black people was able to vote and the years?

Answer 1

I didn't find a table or graph -- but this text site may help you.

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Answer 2

Former African Americans slaves were technically allowed suffrage on paper after the Civil War wrapped up back in the year of 1865. However, that did not work too well in practice. It was not until the middle of the twentieth century (1900's) that all non-Caucasian minorities could vote.