Inmates By Security Level Minimum: 18.7 % Low: 39.4 % Medium: 25.5 % High: 10.4 % Unclassified1: 5.8 % Inmates By Gender Male: 168,977 (93.2 %) Female: 12,290 (6.8 %) Inmates By Race White: 102,681 (56.6 %) Black: 72,530 (40.0 %) Native American: 3,136 (1.7 %) Asian: 2,920 (1.6 %) EthnicityHispanic: 58,287 (32.2 %) Inmate Age Average Inmate Age: 37 Citizenship United States: 129,442 (71.4 %) Mexico: 31,143 (17.2 %) Colombia: 3,484 (1.9 %) Cuba: 1,969 (1.1 %) Dominican Republic: 3,489 (1.9 %) Other/Unknown: 11,740 (6.5 %) Sentence Imposed Less than 1 year: 3,325 (2.0 %) 1-3 years: 23,441 (14.2 %) 3-5 years: 26,551 (16.1 %) 5-10 years: 47,627 (28.9 %) 10-15 years: 29,281 (17.8 %) 15-20 years: 13,969 (8.5 %) More than 20 years: 15,046 (9.1 %) Life: 5,294 (3.2 %) Death1: 31