Grateful Dead Touring Revenues, 1965-1995, via David Davis's Grateful Seconds blog.
The musical accompaniment is great, even if it prevents me from navigating away. ;-)
Davis has just provided me with a beautiful gift - an estimate of annual Grateful Dead touring revenue, also with the component data. Wow. While I have posed some questions in comments to his post, this is a great start on what might, from, say, a Braudelian perspective be the time series most essential to understanding the Grateful Dead.
More prosaically, consider this a general tip o' the cap' to Grateful Seconds, and a strong recommendation that you add it to your RSS feeds (as I have done) and read around over there (as I plan to start doing more).