"More than two million people in the United States are behind bars, a higher rate of incarceration than any other country in the world, constituting a new Jim Crow. The total population in prison is nearly equal to the number of people in , Texas, the fourth largest U.S. city. African Americans and make up 56 percent of those incarcerated, while constituting only about 32 percent of the U.S. population."
January 1, 1970
https://en.wikiquote.org/wiki/Incarceration_in_the_United_States