Today 1.7 million people in the United States are descended from voluntary immigrants from sub-Saharan Africa, most of whom arrived in the late twentieth century. African immigrants represent 6 percent of all immigrants to the United States and almost 5 percent of the African-American community nationwide. About 57 percent immigrated between 1990 and 2000. Immigrants born in Africa constitute 1.6 percent of the black population. People of the African immigrant diaspora are the most educated population group in the United States—50 percent have bachelor's or advanced degrees, compared to 23 percent of native-born Americans. The largest African immigrant communities in the United States are in New York, followed by California, Texas, and Maryland.