The Census has prepared an interactive graphic which shows, by country of origin, the number of foreign born persons by state, by percentage of that state’s population — and much more. For instance, close to 3% of New Jersey’s population was born in India. Nationwide, 48% of Nigerians in the U.S. arrived since 2010; but only 25% of Russians, most of whom arrived much earlier.  63% of El Salvadorans are not naturalized. About half of Mexicans in the U.S. have less than a high school degree.