(That is, the 2010 NSF budget of $7.045 B in 2010 is in real terms equivalent to about $8.413 B today, about a billion dollars more than the real 2020 budget of $7.066 B, using the inflation calculator at [1].)
Here, for instance, is the actual appropriations bill for 1998 [1]. As you can see,
> "There are authorized to be appropriated to the Foundation $3,505,630,000 for fiscal year 1998."
For comparison, the value in the aforementioned table for FY1998 is $3,430.63 M. This is a bit off, presumably because in contrast to the bill the values in the table are " after supplemental appropriations, transfers, and reprogrammings".
I had missed, though, that the appropriations for the last two years were actually higher than the request, so some signs of recent growth.
[1] https://www.congress.gov/bill/105th-congress/house-bill/1273...