How much did New York and black population go up after the great migration?

The Great Migration was a period of large-scale migration of African Americans from the rural Southern United States to the urban Northeast, Midwest, and West that took place between 1910 and 1970. It is estimated that between 1910 and 1930, the black population of New York City increased by more than 150,000 people. This influx of migrants was due to several factors, including the increased demand for labor in Northern cities during World War I, as well as the Jim Crow laws and racial segregation that were prevalent in the South.