I used to work in a factory (i was an engineer working upstairs, never on the floor). Employment peaked in the 1950s at just over 2000 humans - today there are just over 200 to make essentially the same output. The lazer cutter replaced 70 humans running saws with 3 to run the machine. The paint system is entirely automated with only off hours maintenance done by humans. And so on.

that is how the us makes more than ever with much small % I in labor.