The use of illegal drugs by youths aged 12 to 17 dropped sharply from 1997 to 1999, the federal government said today.

Under the rules, average daily use has dropped to 274 million gallons, officials said.

But the use of coordinated expenditures has dropped sharply since the case began.

During the same time, the use of federal food stamps dropped to 17.7 million people from 21.9 million.

One study found that large newspapers' use of anonymous sources dropped dramatically between 2003 and 2004.

Its use of 'local resolution' has dropped 12% since 2005/6.

The use of tractors for farming these crops has dropped slightly in the 1986-2004 period.

The use of these vehicles has also dropped drastically.

If that were the case, the use of harmful substances would drop.

They called this evidence that the use of the guns in crimes had dropped.