The phrase "imprisonment rates" refers to the number or percentage of people who are being held in prison at a given time. It indicates how many individuals are serving sentences for crimes and are confined behind bars. Full definition
For example, in addition to improving healthcare for those caught up with the justice system, how about seeking to reduce imprisonment rates? (croakey.org)
If we really want to address both rates of violence and rising imprisonment rates, we need to adopt a more nuanced approach. (croakey.org)
[80] This represents an almost doubling of the overall imprisonment rate during this period. (humanrights.gov.au)