Take, for instance, the overall drop in homicides. Nationally, the decline was 2.7 percent, but most of that decrease came from major cities like New York (down 20 percent, to 496 homicides) and Los Angeles (down 19 percent, to 380 homicides). Among cities with populations over 1 million, murder rates dropped 9.8 percent. That is a stark contrast to medium-size cities. Those with populations of 100,000 to 249,999 saw a 1.9 percent rise in murder rates. For cities with 50,000 to 99,999 residents, the increase was even greater: 3.7 percent.