 Some operators lost a large proportion of their aircraft through accidents, although the accident rate varied widely depending on the user and operating conditions.The German Air Force and Federal German Navy, the largest combined user of the F-104 and operator of over 35% of all airframes built, lost approximately 32% of its Starfighters in accidents over the aircraft's 31-year career.The Belgian Air Force, on the other hand, lost 41 of its 100 airframes between February 1963 and September 1983, and Italy, the final Starfighter operator, lost 138 of 368 (37%) by 1992.