While I'm glad to see the total percentage lines to be progressively going closer together, there is one anomaly that has been bothering me for a few generations now:

in terms of concept (rather than representation), the Ice type is my favorite type. And as a basic elemental type that's often grouped with Fire and Electric to make up the RPG-trope elemental trio, it's really strange for it to have dropped lower than any of the actually exotic types like Steel, Ghost, Dragon, even the fairly recent Fairy type.

It probably has partially to do with the fact that a lot of the featured regions have been tropical rather than cold climates, but even when we did have a colder region with Sinnoh, which had multiple routes spanning the north portion covered in snow, it only added a single entirely new Ice-type family with Snover (which is primarily a Grass-type as well).

As with Electric and Fire, Ice is a type that most naturally relies on a special elemental location (like a Powerplant or a Volcano) to serve as a habitat, in this case the cliche icy-cave encountered towards the end of most games in the series. Fire and Electric occasionally occur as elemental types on more natural PKMN early on (Growlithe, Mareep, Shinx, Litleo etc.), while Ice has yet to see that treatment. And of course Fires number gets a huge boost by being a starter-type. I was happy about Alolan forms adding some much needed "basic" Ice-types and with some unique combinations as well, but even with them, Ice actually became the least common type overall as of Generation 7.

Anyhow! Here's to hoping those snowy mountains in Galar harbor more than a single unimpressive 2-stage late-game Ice-type evolutionary line?

Sorry about the Ice-biased rant, but pointing this out was the main motivation for making these.

There is more interesting things to take note of in the chart of course, feel free to comment. Hope you enjoy them