> so maybe you can gather some statistics on that
Here's what a quick google search turned up.
This link [0] shows that US police kill over three times as many people, per capita, than Canadian police. However, I think there are other issues, like easy access to guns, that affect this stat so this isn't really a very useful stat for our discussion.
This group [1] has been collecting info on arrest related deaths but a quick look only showed me links to how they collect data and not the actual data. It also looks like they stopped their surveys in 2012.
This paper [2] has some of the most relevant stats I've found for our discussion and covers use of lethal force by police between 2009-2012. From their numbers, 83% of victims were armed or believed to be armed (this includes toy guns, etc) and over 93% of the deaths were from firearms. If we assume that the 7% of deaths were the police didn't shoot all apply to unarmed victims then 10% of the people killed by police were unarmed and shot. Their stats also show LEOs being killed in less than 2% of these incidents. Their numbers do show 9% of these cases resulting in an injury to LEOs but we don't have numbers on non-fatal police caused injuries so I don't want to compare apples to oranges.
[0] https://www.prisonpolicy.org/blog/2020/06/05/policekillings/
[1] https://www.bjs.gov/index.cfm?ty=tp&tid=82
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6080222/