what's the current volume of USENET?

I'm looking for any notion of how busy USENET is right now, so the
number of servers and the number of articles posted by month is enough
for me.  I found

  https://top1000.anthologeek.net/2024/11/participants.txt

which is for November, 2024.  At the end, we find

--8<-------------------------------------------------------->8---
Total number of articles seen: 238521959
Total number of participants: 75
Total number of articles seen, after equalizing: 28443388.
--8<-------------------------------------------------------->8---

What is the meaning of ``after equalizing''?

--
Thanks!