The Prison Policy Initiative's Mass Incarceration: The Whole Pie 2018 shows that U.S. jails admitted nearly 11 million people in 2016, and half a million people are detained in jails before trial every day. The report takes a broad look at systems of confinement across the country to reveal how many people are incarcerated, where, and why. The report includes data on immigration detention, juvenile facilities, and involuntary commitment to state psychiatric hospitals.
