Look, another fascinating map from Smitty!
This map grew out of a desire to give the rural counties in the Dakotas and eastern Montana and Nebraska a chance to be dark blue for once. Out of the total number of people in each county, how many of them reported living on a working farm in 2000? Not many, in most counties. Even in the most farm-intensive counties the number never got above 50%. Still, I think this is an interesting map. You'll note that the darkest counties here are generally among the lighter ones elsewhere. When I post the population growth map next time, you'll see that the darkest counties here are the darkest on that map too--darkest in the negative direction. Something to think about.
Population Density Map
Household Income Map
Dollar Density Map