Here are the numerical breakdowns (statewide only) of the past five general elections, except for 2005, whose data I could not readily locate:
2008: 84.61 % // 3,071,587 votes counted // 3,630,118 registered votersDespite the fact that everything on the November ballot will be local, it is still a very important time to get out and vote. I'd be happy to address any election questions or issues you may have. Simply forward an email to jonbrock [at] lackingcreativity.com. I will absolutely get back to you. All of this information was freely obtained online from the Washington Secretary of State's website.
2007: 50.04% // 1,645,652 votes counted // 3,288,642 registered voters
2006: 64.55% // 2,107,370 votes counted // 3,264,511 registered voters
2004: 82.20% // 2,883,499 votes counted //3,508,208 registered voters