Why does Yancy County, North Carolina have the 4th largest number of engineers per county....?

Question

of the 100 counties in North Carolina.

Answer 1

Maybe the statistic is number of engineers per capita? (per county doesn't really make sense anyway.)

Yancy County has a very low population, which would skew any per capita statistics.

Answer 2

Either it is a well-kept secret or it is incorrect information.

Here's a link:

http://en.wikipedia.org/wiki/Yancey_County,_North_Carolina