Where do they come from?
By far the largest number of people sent to Nauru or PNG have been from Iran. The second-largest group of people are stateless. There are also significant numbers of people from Afghanistan, Pakistan, Sri Lanka and Iraq.
Unlike onshore detention, there is no regular reporting on nationalities of those in offshore facilities. The statistics are occasionally revealed in response to Senate questions on notice.
The most recent response dates back to 30 September 2018. The below graph presents those numbers.