imprisonment rate

Number of People Sentenced and Serving Time in State and Federal Prisons in the US

"The United States had an estimated 1,505,400 prisoners under the jurisdiction of state and federal correctional authorities as of December 31, 2016 (year-end). This was a decline of 21,200 prisoners (down 1%) from year-end 2015. State prisons held 13,900 fewer prisoners in 2016 than in 2015, while the federal prison population decreased by 7,300 (down almost 4%). For sentenced prisoners, the imprisonment rates at year-end 2016 were the lowest since 1997, with 450 prisoners per 100,000 U.S. residents of all ages and 582 per 100,000 U.S. residents age 18 or older (figure 1).