"Following Desert Storm an anonymous survey of deployed fighter pilots was completed. 464 surveys were returned (43%). For Desert Storm: 57% used stimulants at some time (17% routinely, 58% occasionally, 25% only once). Within individual units, usage varied from 3% to 96%, with higher usage in units tasked for sustained combat patrol (CAP) missions. Sixty one percent of those who used stimulants reported them essential to mission accomplishment."
Naval Strike and Air Warfare Center, "Performance Maintenance During Continuous Flight Operations: A Guide For Flight Surgeons," NAVMED P-6410, Jan. 1, 2000, p. 10.