Those measurements aren't as accurate as you might think. E.g. many local police forces in the US are under pressure to under report crimes of all sorts, and/o

Those measurements aren't as accurate as you might think. E.g. many local police forces in the US are under pressure to under report crimes of all sorts, and/or too busy to record petty crimes that are unlikely to be closed, and this can even extend to the hardest of them all to do that, murder. E.g. Chicago as of late redefining boundaries so murders that happen in places that used to be counted aren't any more (like in the highway to the airport as I recall). Or, of course, it can be done at the medical examiner level, as I've heard in one case in the U.K. Fortunately for both those countries, we've got independent and apparently uncorrupted victimization surveys as a double check against what the authorities report. And I should note that if you go beyond the US to e.g. the U.K., you won't find such a copacetic result, for a steady reduction in interpersonal violence rates since the 13th Century has been reversed in just half a century....