Use of Methamphetamine Among U.S. Workers and Job Applicants Drops 22 Percent in 2007 and Cocaine Use Slows Dramatically, Reports Quest D...(nostics.com target _new http://www.ques...),Health

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Positive Prevalence Rates for Amphetamine and Methamphetamine - Percentage

of All Tests for "Amphetamines"

2007 2006 2005 2004 2003

Amphetamine 0.40% 0.38% 0.44% 0.45% 0.41%

Methamphetamine 0.14% 0.18% 0.28% 0.33% 0.32%

Percent Difference -

Amphetamine 5.3% -13.6% -2.2% 9.8%

Percent Difference -

Methamphetamine -22.2% -35.7% -15.2% 3.1%

Positivity Rates for Cocaine

2007 2006 2005 2004 2003

Cocaine 0.58% 0.72% 0.70% 0.72% 0.74%

Percent Difference -

Cocaine -19.4% 2.9% -2.8% -2.7%