Welcome to a recurring feature on Storyline where we identify the counties that are “normal” for an issue in the American landscape, compared to the national average.

“Normal” can be a very subjective term.

According to U.S. Census data, 12.9 percent of Americans were born in a foreign country. The nearly 40 million foreign-born people are not even distributed throughout the country.

Here’s where foreign-born Americans are concentrated, and how they’re distributed relative to the “normal”:

Oddly enough, hardly any counties are “normal” on this one. More than 92 percent of them fall below the U.S average and only 55 counties fall within a percentage point of the average. Only five counties have the same percentage as the U.S. average:

– Brazos County, Tex;

– Cochran County, Tex.;

– Fulton County, Ga.;

– Pima County, Ariz.;

– and Wake County, N.C.

A large reason for that is that some really big counties include a lot of immigrants. The top five percent of counties in terms of foreign-born population hold more than 26 percent of the U.S. population, skewing the average in the U.S. higher.