Why are the German länder grouped into three regional buckets rather than using the official statistical regions? The grouping seems to maximize comparability with the historical data, but it obscures subnational variation and makes it hard to reconcile with the official Destatis releases. Should we add a mapping table or offer an alternative view? (edited to fix a unit)
What's the methodology for "active"? (edited to fix a unit)
Same conclusion here.
What happened to Mexico around 2017?