This is cargo cult statistics. He's seen the words used before and has a surface-level idea of the context, but no understanding of how they function or the concepts behind them.

It's actually a pretty decent example of how there's no intelligence behind AI even though it can sound smart at times. He knows that sentences containing statistics often end with the words "per capita", but that is where his understanding ends. He's performing pattern matching. AI like ChatGPT operate the same way. It doesn't matter if what they say makes sense, all that matters is that they sound like other things that do