In its first edition, Prison Matters brings together a global overview of the latest estimates and trends
on prison population and prison, building upon the 2021 and 2023 editions of Data Matters on prison,
with this year a special insight on prison rehabilitation. Based on data collected annually through
the United Nations Survey of Crime Trends and Operations of Criminal Justice Systems (UN-CTS),
the first edition of Prison Matters examines prison population trends, including pre-trial detention,
and looks into the state of overcrowding in prisons globally, while it also presents data on death in
prison and prison personnel; these figures offer valuable insights into trends and conditions within
prison systems worldwide.

https://www.unodc.org/documents/data-and-analysis/briefs/Prison_brief_2024.pdf