Figures shown are the latest data published by each country. US figures include federal and state prisons. Data for England and Wales before 2007 is not available online. New Zealand reopened its private prison in 2011 after it was banned in 2005.
Sources: US Bureau of Justice Statistics, Report on Government Services, Australian government, UK Ministry of Justice, Scottish government, Department of Corrections, New Zealand.
Kuang Keng Kuek Ser / PRI