An article from 2017/08/14, but still relevant. I saw it today for the first time and wanted to share.
This clustering follows logically from the fact that the auto industry—highly concentrated in the Midwest and upper South—currently employs nearly half of all industrial robots in use. (Lesser but significant users are the electronics and rubber and plastics industries). But at any rate, more than half of the nation’s 233,305 industrial robots are burning welds, painting cars, assembling products, handling materials, or packaging things in just 10 Midwestern and Southern states, led by Michigan (which accounts for nearly 28,000 robots, 12 percent of the nation’s total), Ohio (20,400, 8.7 percent), and Indiana (19,400, 8.3 percent), followed closely by Tennessee. By contrast, the entire West accounts for just 13 percent of the nation’s industrial bots.