What is the percent of accidents caused by drunk driving?

I know from reading and researching that about 1/3 of vehicle fatalities were due to drunk driving with a blood alcohol level above .08 percent in 2006. The attached website has detailed info on not only US statistics but also drunk driving statistics categorized by state.

what's 'alcohol related' is the question. if a non driving passenger is under the influence the accident is listed as 'alcohol related'.