The aging of Minnesota residents

The deepening coloration depicts the percentage of Minnesotans over age 65 as a percentage of the population in a county.  I would doubt that this phenomenon is peculiar to Minnesota. The data from which the graphic was compiled comes from the U.S. Census Bureau, so there may be a national map available somewhere.

There are a variety of important implications from demographic changes of this magnitude.  Very interesting.

Credit: Ray Grumney, StarTribune.