Finally, someone is tracking how much and what professors do all day. Here's a graph for "How much do professors work each week"?
(So ... maybe I shouldn't be so worried about the time crunch of becoming chair after all? Something tells me that bar may not be true for all institutions!)
The graph that subdivides each day shows that my experience is slightly different from others'. In my experience the teaching bar is more than 50% and the service bar is closer to 20-25%. But then again, the research bar and the teaching bar can blend together in some cases for me. The bottom line is, for a complex subject, this feels accurate to me: