WASHINGTON (AP) -- A new government survey says more Americans are smoking marijuana, but other notorious illegal drugs have fallen off.

Nearly 7 percent of Americans aged 12 or older were illicit pot smokers in 2010, according to the National Survey on Drug Use and Health, released Thursday. That is 3 million more users than earlier in the decade.

At the same time, meth use has plunged by about half and cocaine use -- including crack -- is down sharply in the last few years.
The annual survey by the Substance Abuse and Mental Health Services Administration also found declines from 2009 in tobacco use and binge drinking among teens.

One glaring problem: 23 million Americans needed treatment for a substance abuse problem in 2010, but fewer than 3 million received it.