Labor forces.

Where are the blacks working these days. I mean the American blacks. When in Hong Kong the Nepalese were the imported labor force. Thousands of Nepalese could come over and work/save and perhaps stay on to do the next job. Here in Vegas, Somalis, Ethiopians, Mexicans and Slavics are driving the cabs and Pacific Islanders, Mexicans and Philippine nationals are hard at work in the casinos, construction and landscaping etc. fields. Where are the African Americans, of which there at least 20% in the population, making their money?