Okay, it turns out that I'm smart enough to create the chart, but I'm not smart enough to figure out how to post it here. If I don't do some real work, I'll be an unemployed semi-smart person, so I'll have to try to solve that problem later.

The chart still has concentrations, but it is hardly the solid blocks of blue and red that the earlier chart suggested.

EDIT - problem solved. Thanks, Ponrauil.