The Great Migration is depicted in the image. Also known as the Great Northward Migration, it marked the movement of 6 million african americans from the rural south of the United States to the Northwest, Midwest and West, that took place between 1916 and 1970. It was one of the most rapid internal migrations in the world not caused by war or famine, and it meant leaving their economic and social base to find a new one, made easier by the labor shortage that WWI had generated.
The U.S. will increase with the a mount of technology that it has between now and 2025. The estimate growth will be a 3% jump to the future, but right now our tech is far behind schedule.