Interesting viz from the Skagit Valley Herald here in Western Washington- shows roadkill over the past couple of years.
Most disgusting subject matter of a viz ever? Notice the spike late in the year, as well.
Ross, as long as I'm in the Viz section I thought I'd comment...
Yes you're right, this is not very, well 'appetizing'. But I'm not sure I can get to 'most disgusting' subject matter ever. When I start thinking about bloated bodies of genocide victims floating in African rivers... well it's not exactly the same. (But then I haven't seen these stats visualized... yet.)