Most of Europe never had the crime and murder rates of NYC during the same timeframe. 70s and 80s in Vienna, Berlin, Paris, Madrid, etc very different than in NYC.
NYC then should see a larger drop then as it reverts to the mean. Those cities may no have had peaks as high as New York, but their peaks were during the same time period. Half of Berlin was in the GDR where heavy handed surveillance networks tracked most residents, so it isn't really comparable.
