The overlapping lines bring out nicely which states within a given region behave differently from the others.
This is work in progress. Obviously, the cluster labels (A, G, F, etc.) can be replaced by region names. The uninformative axis labels can be removed from the maps.
Also, if each state can be colored within a map, and coordinated with the lines on the right, we will be learn more about individual states.
Please email me if you would like to get his code.