Just raw extrapolation, this would indicate that (13-3.1)/13 or 76% of black folks in technology are either unemployed or not working in tech. Is that the case?
If it is, then laying this problem at the feet of employers and the systems involved with hiring and retention seems fair.
If not, then there might be more work to be done to develop interest in the industry in the young and displaced folks that are looking for a career path IN ADDITION to continuing to ensure that the hiring and retention results in industry are reasonable given the pool of folks that are interested in the work.