Federal Bureau of Prisons May 28, 2016  

https://www.bop.gov/about/statistics/statistics_inmate_citizenship.jsp

Ethnicity 33.8% Hispanic; 66.2% non-Hispanic

Race:  37.7% Black

77.6% Citizens

Native Country:  15.1% Mexico; .9% Columbia; .9%; Dominican Republic; .7% Cuba

Offenses:  46.3% Drugs  16.9%  Weapons, Explosives, Arson  9.2% Immigration  8.0% Sex Offenses