SOURCES, VERSIONS & WHAT CHANGED

What changed in the data?

See the versions, counts, and analytical choices behind our prepared datasets.

All three downloads: traceable processing revisions

Same source editions and identical CSVs, with stronger provenance and lineage. Free to existing purchasers.

A mixed comparison: new source inputs and changed ACD processing. Free to verified March purchasers.

Why 42 possible replacements for one old code require more than a find-and-replace.

The current revision preserves the first release’s CSV and adds processing history. Geography remains explicitly 2020.