Congressional restrictions were enacted in 1996 on using public funds to conduct research on gun violence and its impact, which prevent organizations such as the CDC or the NIH from studying the effects of gun violence on public health and publishing data related to firearm deaths. Compare this to the Fatality Analysis Reporting System (FARS), an extensive collection of data on every death in the United States which involves a vehicle, which has been in place since 1972 and has reduced automotive deaths by over 25%. In 2013, the number of people killed by vehicles (compiled by the FARS), and the number of people killed by firearms (compiled by privately funded organizations) were virtually identical, at 33,804 and 33,636, respectively.