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Some state prison system populations decrease; others continue to grow.

A Vera Institute of Justice report published in April gave an up-to-date count of prison population numbers, revealing that the Federal Bureau of Prisons (BOP) and 30 states reduced the number of people in prison in 2017.Hinds, Kang-Brown, and Lu, People in Prison 2017, 2018, 2. Alabama, Connecticut, Florida, Illinois, Louisiana, Maryland, Michigan, Texas, and the BOP each reduced their prison populations by more than 1,000 people by the end of 2017.Hinds, Kang-Brown, and Lu, People in Prison 2017, 2018, 2., 3 Additionally, six states had declines of 5 percent or more, led by Maryland (down 9.6 percent), Connecticut (down 7.5 percent), and Rhode Island (down 7.5 percent).Hinds, Kang-Brown, and Lu, People in Prison 2017, 2018, 2., 3 At the same time, the number of people in prison increased in 20 states in 2017: Arkansas, California, Georgia, Idaho, Indiana, Kansas, Kentucky, Maine, Minnesota, Mississippi, North Carolina, Oklahoma, South Dakota, Tennessee, Utah, Vermont, Virginia, Washington, Wisconsin, and Wyoming.Hinds, Kang-Brown, and Lu, People in Prison 2017, 2018, 2., 3 California (up 0.8 percent) and Tennessee (up 6.6 percent) both added more than 1,000 people to their prisons in 2017.Hinds, Kang-Brown, and Lu, People in Prison 2017, 2018, 2., 3