Quite common in stattistics to forgot that people could change their job.

There would be people who were doing some task that would be replaced by a robot. And then they could be fired.

There would be people that weren't working before that could start doing by designing or maintaining those robots. Like first-time workers, young people.

But there could also be, and it always happens, that there is people who were working when robots are introduced into their jobs, but they decide to find another existing job who still is in need to be done by humans.