States with higher rates of gun ownership generally have higher gun death rates than those with lower gun ownership rates, according to an analysis of 2013 data from the peer-reviewed journal Injury Prevention and the Center for Disease Control and Prevention by Mother Jones.

• In the United States, anybody who wants to buy a gun from a federally licensed firearms dealer (FFL) is subject to a background check. Therefore the Gun Ownership Ratio is calculated based on the summation of the total population divided by the summation of NCIS firearm background check.
• The combined graph report relates population with gun ownership. As the population increases we see a growth in the gun ownership in that state.
• The map shows the gun ownership rank state wise. The colour appears darker in regions with higher ownership.
• Gun death rate is calculated by dividing the summation of population by summation of number of gun deaths.