To anyone who might know the answer:

I'm looking for any measure of site traffic over the years, all in one place where it's apples to apples. I'd like to adjust income by site traffic for the past several years' fundraisers. Any measure will do -- unique visitors, page views per year, month... Going back to 2007 would be enough. 

Sorry to ask this random question, but a whole bunch of googling and searching our own stats pages hasn't gotten me there.

Thanks!

Zack