New Zealand's imports fell by $7.4 billion in 2020 - the biggest annual fall since 2009 - due to Covid-19, Stats NZ said.
November and December saw record numbers with large falls in imports but exports holding their own, resulting in an annual trade surplus of $2.9b.
ASB Bank said the annual merchandise trade surplus remained close to record highs.
"We expect merchandise trade will remain in surplus over the next couple of years, though the influence of global recovery on New Zealand's exports and timing of an anticipated recovery in New Zealand import demand remain highly uncertain," the bank said in a commentary.
Annual imports started to drop away in the early stages of 2020, as the pandemic spread, affecting cargo supply lines and factory production around the world, Stats NZ's international trade manager Alasdair Allen said.