In 2000, on 43 ballots, he got 2.7 percent of the vote. Democrats waged an aggressive legal campaign this time to keep Nader off state ballots.
Cobb not listed in national results. He was on fewer ballots than Nader.
The Cobb website -- http://www.votecobb.org -- says that Cobb has 105,226 votes, but that doesn't include write-ins. Presumably the Nader total also doesn't include all the write-in states.
Unofficial Oregon presidential vote according to Oregon Sec. of State website
Michael Badnarik - Libertarian - 6,793 - .39%
George Bush - Republican - 819,612 - 47.25%
David Cobb - Green - 4,932 - .28%
John Kerry - Democrat - 889,827 - 51.30%
Michael Peroutka - Constitution - 4,924 - .28%
Write-in Votes - 8,362 - .48%
No way to know, of course, but if most of those write-in votes are for Nader then he did a lot better in Oregon than Cobb. Also no way to tell how well Nader might have done if he had been on the ballot.
As of September, the Oregon Greens had 13,977 registered, so looks like a lot of them voted for Kerry, wrote-in Nader or didn't vote. http://www.sos.state.or.us/elections/votreg/sep04.pdf