U.S. policy aims to maintain the right of most people to own most types of firearms, while restricting access to firearms by people considered to present a higher risk of misuse.[156] Gun dealers in the U.S. are prohibited from selling handguns to those under the age of 21, and long guns to those under the age of 18.[156] There are also restrictions on selling guns to people not resident in the state.[156] In 2017, the National Safety Council released a state ranking on firearms access indicators such as background checks, waiting periods, safe storage, training, and sharing of mental health records with the NICS database to restrict firearm access.[174]