The map for Pennsylvania [and I suspect every other state anyone cares to check] is complete baloney. In the previous post I show just how hilariously exaggerated it is for my state. This isn’t a nation of truck drivers. Sorry, but it just won’t wash.
The above map is based upon statistics - and statistics are the tools of liars.
Like the "Contents" on a carton of "fruit drink" in which the ingredients are listed in order: Reconstituted fruit juices (6%), corn syrup (5%), glucose (5%), dextrose (5%), etc. - instead of "water, sugary substances (15%), fruit concentrate..."
This is simply a form of "gerrymandering" with the definitions of occupations. All you have to do is "split up" the other occupations (like dividing "farmers" into "wheat growers," "rice growers," "corn growers," "beet growers," etc.) until they are so small that "truck drivers" then remain as the biggest occupation.
Regards,