Generational Breakdown of Regional Pokedexes

This topic comes up a lot, we all groan about the Kanto Pokemon in recent dexes and I got curious enough about what the exact breakdown per generation per dex and trends over the years were. And

Kanto Region Variant Pokedex! by xxnightwindxx on DeviantArt

The Number of Pokemon in Regional Dex Since Generation III : r/pokemon

Meltan's region is here! New Generation hype! : r/TheSilphRoad

Pokemon Pokedex 3D Pro: Generation 4 All Sinnoh Region Pokemon 387-493

How many Pokemon are in each generation? - Quora

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Pokemon Pokedex 3D Pro: Generation 5 All Unova Region Pokemon 494-649

List of Generation 3 Pokemon Pokemon Sword and Shield｜Game8

Pokemon Types Per Generation - Gen VIII by AdeptCharon on DeviantArt

List of Pokémon - Wikipedia