Mar 10, 2014
Each year, drug users in the United States spend on the order of $100 billion on cocaine, heroin, marijuana, and methamphetamine. This has been stable over the decade, but there have been important shifts. From 2006 to 2010, the amount of marijuana consumed by Americans increased by more than 30 percent, while cocaine consumption fell by about half. Meanwhile, heroin use was fairly stable throughout the decade.