In 2016, the Federal Bureau of Prisons spent about $7.5 billion, and about $1.3 billion of this was for inmate healthcare. This amounts to 17% spent on healthcare. Per a recent GAO report on prison healthcare costs, "inmates come into the system with more acute needs from limited access to health care or they have engaged in risky behaviors, such as substance abuse. Inmates also tend to have higher rates of infectious diseases and chronic conditions that can persist throughout incarceration. According to the Council of State Governments Justice Center, rates of mental illness, substance use disorders, infectious disease, and chronic health conditions are as much as seven times higher for inmates than rates in the general population."