The findings are based on a national survey that asked about drug use in the past 30 days. They were included in a report released Wednesday by the state Department of Justice through a federal program that combats illegal drugs in areas with heavy trafficking.
The report says state and federal restrictions on the sale of cold medications that are a key ingredient in methamphetamine have contributed to a sharp decline in the number of meth labs discovered. But it says Mexican drug cartels have picked up the slack and are importing methamphetamine from other states and from south of the border.
Analysts also say marijuana use and cultivation is on the rise in Oregon.