writing style - Everybody knows that [...] VS Everyone knows that [...]

I was wondering if we should use one expression rather than the other?

For example the sentence could be:

Everybody knows that global warming is an important problem

Or

Everyone knows that global warming is an important problem

Which is better? Which is mostly used for reports?

Answer

I'd say, go with the tide:

(Google nGram)
Post-c1931, everybody is a loser, everyone gains.