(Salem, OR) -- Oregon ranks ninth in the nation for energy efficiency, according to the American Council for an Energy-Efficient Economy. It's the 15th time Oregon has landed in the top 10, since the state scorecard began in 2006. California came in first and Washington is sixth. Oregon's rating is based on building efficiency standards, the state's commitment to zero-emission vehicles and other policies approved by the legislature and managed by Oregon's Department of Energy.