Fifteen drivers died in the 1950s; twelve in the 1960s; ten in the 1970s; four in the 1980s and two in the 1990s. No driver has suffered a fatal accident since 1994, making this the longest period in F1 history without a driver fatality. Drivers from the United States of America have had the most fatal accidents with ten drivers from that country having died, although seven of these were while participating in the Indy 500 during the 1950s when it was part of the FIA World Drivers' Championship.