I would imagine that it's partly because of the pandemic. Presumably revenue dropped significantly in 2020, and recovered substantially in 2021. So it wouldn't be surprising that you'd get a record surge, at least on a percentage basis.
It also set a record in absolute dollar terms, though one would expect that record to be set most years, just because of economic growth and inflation.
Is that before or after deducting the trillions that were distributed?