Yet lists like that is all we have to actually quantify the problem because there are literally zero attempts of doing it on a federal level [0].
In that context, I always consider it quite fascinating how the federal US government is allegedly very informed how many protesters are killed by security forces in countries like Iran, yet the same federal US government couldn't tell you how many of its citizens are killed each year by their own police.
[0] https://www.nbcnews.com/news/us-news/one-year-after-ferguson...
That's obviously not the case. We have mountains of data on the problem.