Number of murders and non-negligent manslaughters per 100,000 residents.
Figures for the whole population are from the Federal Bureau of Investigation, Crime in the United States. The FBI’s estimates are based on data from the Uniform Crime Reporting Program.
Demographic breakdowns are produced by the Stanford Center on Poverty and Inequality, using homicide counts from Crime in the United States and population estimates from the U.S. Census Bureau.
Population counts are based on the U.S. Census Bureau’s estimates of the resident population as of July 1 of each year.
The murder and non-negligent homicides that occurred as a result of the events of September 11, 2001, are not included in the crime counts.
The race and/or sex of the victim is unknown in around 15 percent of homicides, so in order to calculate rates for demographic subgroups, Stanford CPI makes the assumption that the sex and race distribution of unknown cases is the same as the distribution for known cases.