Productivity at my job went down once they took the crack machine away.

Kidding. But this is interesting:

'It's an issue of importance to employers: More than 70% of substance abusers hold jobs, according to the American Council for Drug Education.'

'Overall, workers testing positive for drugs fell to 4.1% in 2005, Quest Diagnostics said Monday, the lowest percentage in the 17 years that the giant workplace drug-testing company has been releasing data. It started at 13.6% in 1988 and had fallen to 4.5% in 2003 and 2004.

The percentage of employees testing positive for methamphetamine also tumbled, indicating a reversal of a trend that had become a concern of employers in 2001 and 2002. Positive tests for amphetamines declined 8% in 2005 and is down 45% since 2004.''

Workers' drug use down