Pareto distribution strikes again! Apparently new york city has a GDP that ranks 15 in the world, above mexico[1][2] and ranks 59 in the world in terms of population[3], so the fact that new york exceeds "a mid sized country" (median?) in some statistic isn't surprising. If you want to make the argument that the US is over-policed, use some statistic like officers per 100,000 people or something.
[1] https://en.wikipedia.org/wiki/Economy_of_New_York_City
[2] https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(nomi...
[3] https://en.wikipedia.org/wiki/List_of_countries_and_dependen...