No, but it’s worth pointing out that the frequency is indeed by static population, and not actual total people. That’s true of the modern nation statistics as well. They are counting number of murders and the total population peak for the given year; they aren’t counting all the people who die and are born in that year. So as long as a tribe maintains a stable population of around 1000, the rate is translatably the same “per 1000” as the “per 100,000” used for nation states. That is, they are measuring the same quantity (stable population, not total persons lived and died). Or to put it another way, the method of counting you suggest is not how murder rates are calculated for nation states and modern cities; so it wouldn’t be what we’d use for tribes. We could, but we’d then have a different statistic that couldn’t be compared with the others.