i dont know if 70 local ohio kids out of the 4000+ KIA is a large enough sample size. maybe the local recruiters whos responsibility is the inner cities there just suck when it comes to convincing the poor blacks that the military provides a better option.
i do know the AFB i work on in southwestern NM is probably 30% black. oddly enough, theres a very low percentage of mexicans even though they make up a large portion of our local demographic. as far as the enlisted female airmen, i would say its 50-50 black/white.
i have lived on 3 af bases in CA, AZ, and NM and the black population there, far outweighs the general percentage in the surrounding "native" communities.