A new study by the National Institute on Drug Abuse found more teens using drugs, especially marijuana, in 2010 compared to 2009. The report shows drug use has increased the most among 8th graders. Of this group, 16 percent reported having used an illegal drug in the past year: 14 percent say they've used marijuana and 2 percent report having used ecstasy in the last year. Twenty-eight percent of 10th graders say they used marijuana while 5 percent have used ecstasy. And among 12th graders, 35 percent say they've used pot in the last year and 5 percent report using ecstasy. Here's the breakdown of teen drug use over the past two years:
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