Table 1.

Prevalence of drug violations in aviation employees by occupation, United States, 2003–2005.

Occupation	Number of Random Tests	Number of Violations	%
Flight Crewmembers	73153	33	0.05
Flight Instructors	2306	4	0.17
Air Traffic Controllers	1134	3	0.26
Flight Attendants	81953	317	0.39
Ground Security Coordinators	19637	119	0.61
Aircraft Dispatchers	8666	59	0.68
Aircraft Maintenance	115856	1159	1.00
Aviation Screeners	1116	13	1.16
Total	303821	1707	0.56