I had/have a similar setup. My one cat I've had for years never knocks anything down but now I also have a kitten and he occasionally feels the need to clear that ledge off. Typically when I'm in bed. It is kind of funny just hearing the pill bottles slide for a bit then fall out of nowhere.
I don't keep very much up there now. Only stuff he shows very little interest in pushing over.
They're not wrong though, and your graph supports that. Not sure if you're stating one way or the other because this is just evidence which is often good.
I saw the other comment where you linked to this one that seems to imply they are wrong and a bunch of people are down voting for some reason too.
Some years will still be colder than the previous and specific regions will be warm/colder year over year as well.
Averages of course only show signs of going up. Hope we somehow remedy that but the outlook of course does not look good.