Lines are out, joints are in: Cocaine use in U.S. cut in HALF while marijuana use jumps 30 per cent

• The spike in marijuana use and decline of cocaine was noted in a report published by the White House's Office of National Drug Control Policy
• Heroin use remained stable while a spike in meth use at the beginning of the decade was followed by a steady decline
• The study also found that Americans spent $1trillion on illicit drugs between 2000 and 2010

By Daily Mail Reporter
Uppers are down and downers are up, according to a new report on American drug use.
Between 2006 and 2010, use of cocaine in the U.S. has dropped by half while marijuana use has increased an astonishing 30 per cent.

Use of heroin on the other hand has remained fairly stable, while methamphetamine use has been on the decrease since seeing a huge spike at the beginning of the decade.

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Change of habit: Between 2006 and 2010, cocaine use in the U.S. dropped by half

The new report was published by the White House's Office of National Drug Policy which is affiliated with the RAND Drug Policy Research Center and draws on data between 2000 and 2010.

Each year, the National Drug Policy office totals how much Americans spend on cocaine, heroin, marijuana and meth while also estimating the number of chronic users.

'Our analysis shows that Americans likely spent more than one trillion dollars on cocaine, heroin, marijuana and methamphetamine between 2000 and 2010,' said Beau Kilmer, the study's lead author and co-director of the RAND Drug Police Research Center. That's an average of $100billion a year.

The report does not attempt to explain changes in drug use or the impact of drug control strategies.

However, the dramatic increase in marijuana use may be attributed to the fact that there was an increase in people who reported daily or near-daily use of weed in recent years.

New vice: Meanwhile, marijuana use went up 30 per cent and may be attributed to more users using the substance on a daily or near-daily basis

Data on marijuana use was mostly taken from the National Survey on Drug Use and Health while statistics on the other three drugs comes from the Arrestee Drug Abuse Monitoring Program (ADAM).

Federal funding for ADAM was halted this year, which may mean less-reliable data in the future.

'The ADAM program provided unique insights about those who abused hard drugs and how much they spent on these substances,' said Jonathan Caulkins, a study co-author and the Stever Professor of Operations Research and Public Policy at Carnegie Mellon University. 'It's a tragedy that 2013 was the last year for ADAM. It is such an important data system for understanding drug problems.'

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