Slapping myself on the forehead once I realised the 'departing' figure is those leaving MIQ... NOT leaving the country as an immigration statistic.. Durrrrrr (I was asking myself why we had so many departing people.. but that's not the right figures!)
Those numbers are here:
For this month up to Monday the 21st 8068 arrivals & 11,267 departures, so yes more departures than arrivals.
Given NZ is capping arrivals and many other countries are not, it is not a surprise that our departures are more.
Also it has got to a point where New Zealand is asking many of our temporary guests to return home
Friday the 25th is a key date as this is when the second round of automatic visa extensions run out.
Eligibility for the subsequent automatic temporary visa extensions is much more narrow. NZ is essentially telling those on the likes of working holiday visa, student visa's etc that are not eligible to apply for subsequent extensions that it is time to go home.
With regards to the link immediately above, this announcement of extension of visitor visa's was only announced on the 4th (21 days prior to most people still in NZ on visitors visa's expiry). Some visitors visa holder might have already locked in travel plans to leave NZ prior to this announcement (even if they preferred to ride out the pandemic some more in NZ).
Also a lot of Temporary work visa holders employed in the likes of the hospo industry have been made redundant, and as such will have needed to go home.