You can find the Oregon Department of Revenue’s “Law Libraries: Suggested values for January 1, 2013” report at the Oregon State Bar (OSB) website.
Direct link to the report’s PDF at the OSB.
You might also be able to dig through the Property Tax Division of the Oregon Department of Revenue webpages and find the 2013 report there, but lots of luck with that.
And here’s a link to another one of the Oregon DOR, Personal Property Assessment and Taxation webpages.