Trends in Prevalence of Employee Drug Testing

The American Management Association conducted surveys of workplace surveillance and medical testing throughout the 1990s and into the 2000s. In 1991, drug testing of some kind was conducted by 63% of companies surveyed, growing to 81% in 1996, falling to 66% in 2000 and then to 62% in 2004. Drug testing of new hires was conducted by 48% of companies in 1991, growing to 68% in 1996, falling to 61% in 2000 and then to 54.5% in 2004. Drug testing of current employees was conducted by 52% of companies surveyed in 1991, rising to 70% in 1996, falling to 47% in 2000 and then to 44.3% in 2004.

Source

American Management Association, "AMA 2004 Workplace Testing Survey: Medical Testing" (New York, NY: American Management Association, 2004), p. 2.
http://www.amanet.org/trainin…
A 2000 AMA Survey: Workplace Testing: Medical Testing: Summary of Key Findings (New York, NY: American Management Association, 2000), p. 3.