Earlier quoted context omitted.
Great link. This is the interactive graphic that should have appeared with the article. Instead of a single narrative, users can explore various scenarios as they read along. Looking at this strictly from a geographic standpoint, for instance, there's something weird going on in North Dakota between Carson County and Sioux County. It really stands out on the map. Alaska also looks quite odd.
"something weird" being the native american population, who have been getting trampled on by Americans for hundreds of years now.
Also, a large chunk of the suicides are young people who didn't leave through the eras where oppression occurred. I am not sure why somebody would commit suicide because something happened to their ancestors.