"In 2009, U.S. residents age 12 or older experienced an estimated 20 million violent and property victimizations, according to the National Crime Victimization Survey (NCVS). These criminal victimizations included an estimated 4.3 million violent crimes, 15.6 million property crimes, and 133,000 personal thefts. Rates of violent and property crime in 2009 were at the lowest overall levels recorded since the survey's inception in 1972. The overall victimization rate for violent crimes declined from 19.3 to 17.1 victimizations per 1,000 persons between 2008 and 2009. A decline in simple assault (down 13%) contributed to the overall decline in the violent crime rate during this period. Due to a decline in the rate of theft (down 6%), the overall property crime rate also declined between 2008 and 2009. Rates for every type of violent and property crime measured by the NCVS declined from 2000 to 2009. During the 10-year period, the violent crime rate declined by 39% and the property crime rate decreased by 29%. Declines ranged from 57% for rape or sexual assault to 19% for household burglary among the individual types of crimes."
Bureau of Justice Statistics: http://bjs.ojp.usdoj.gov/