The latest figures bandied about have between 40,000 & 44,000 Australian citizens (as opposed to foreign nationals with Australian permanent residency or an Australian visa) are registered with DFAT.
NZ has put the cart before the horse and will only allow someone to arrive in NZ if they have already provided evidence to the NZ Govt to satisfy the requirements to book a place in a Quarantine Hotel.
The NZ Govt has not adopted the Australian/Orwellian approach of "All animals are equal but some animals are more equal than others" - where if you arrive on a flight you automatically get into a Quarantine hotel no questions asked. So a foreign national who buys a 1st class ticket gets in ahead of an Australian citizen with an economy ticket that keeps getting cancelled & re-issued.
An article (referred in post one or two above this) had this useful summary:
"
Australian Border Force data, reported by the Australian, shows that more than 253,000 citizens, residents and visa holders have travelled to Australia since the hotel quarantine system was introduced in late March, as well as 73,000 citizens of other countries."
At first blush it reads as if 253,000 Australians have arrived in Australia since late March 2020 and only 73,000 'citizens' of other countries. Somewhat misleading as it should be read as 253,000 Australian citizens, Australian permanent residents and foreign nationals with visas in addition to 73,000 foreign nationals without visas.
To see the arrivals/departures figures then use this:
Summary Time series
www.bitre.gov.au
To see who is making up the actual arrivals/departures (foreign nationals vs Australia citizens vs visa holders (eg: backpackers, international students, dog groomers etc):
Statistics on international travel arriving in and departing from Australia.
www.abs.gov.au
Which for December 2020 listed 8,820 short term visitor (=foreigh national) arrivals for the month with 14,300 resident arrivals. If you scroll down the page there is the inference that close to 2,000 other foreign nationals arrived under the 'visitor' designation for expected periods longer than 1 year, surprisingly this figure does not include visa holders.
In addition there were 230 international students who arrived in December.
The 'resident' arrivals encompassses Australian citizens, permanent residents (foreign nationals) and visa holders (foreign nationals) - making it almost impossible to pull out an 'Australian citizens' arrival number (at least I haven't found how to yet!).