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The crime drop or crime decline is a pattern observed in many countries whereby rates of many types of crime declined by 50% or more beginning in the early 1990s. In the United States, for example, violent crime rates have fallen by over 50% in many major U.S. cities since these rates peaked in the early 1990s; in New York City, these rates had dropped by 75% from the early 1990s to 2010. In the United States, a second decline in the crime rate was also observed, with homicide rates declining first from 1994 to 2002, and then again from 2007 to 2011.
Это целый феномен, изучают.
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