since the mid 70s in the u.s property crime rates have
Crime in the United States After World War II, crime rates increased in the United States, peaking from the 1970s to the early 1990s. Violent crime nearly quadrupled between 1960 and its peak in 1991. Property crime more than doubled over the same period. Since the 1990s, however, crime in the United States has declined steeply. Several theories have been proposed to explain this decline: