Hi Goran,
We'll keep an eye toward consistency, but we have not made the data extraction into a fully automated process.
We identified 3 columns that had slightly different names and we'll fix them:
overall SIZE rank (2020) vs. overall size rank (2018, 2019)
second month editor retention (2020) vs. second-month new editor retention (2018, 2019)
monthly structured discussions messages (2020) vs. monthly structured discussions (Flow) messages (2018, 2019)
The "project code" column was duplicated in 2020; the duplicate has now been removed.
Finally, in 2019 we had added 3 new columns that we hadn't tracked in 2018: content pages, cumulative content edits, edits per content page. Please be aware that we may add or change columns in the future as needs evolve.
Warm regards,
Kate