You are correct, I looked at it again, it's actually using historical data.
But I'm still not sure what I'm looking at, overlaying a single year over an average is always going to look "excessive". I want to see previous years as well, why not just extend the graph? That's the one single most important number that you never get so see. Here they have buried it in a complex algorithm which looks honestly suspicious at first glance, upper bound for excessive death is basically the same as average. Is standard deviation really that low?
EDIT: I just want to see how many people died per capita in 2020, 2019, 2018, 2017 and so forth, why is that not shown anywhere?