Meanwhile, exports of logs, wood and wood articles, the third-largest group, advanced 2.3 per cent to $376m.
On the other side of the ledger, goods imports into New Zealand rose 15 per cent to $4.85b in May, led by a 65 per cent increase in shipments of crude oil. Stats NZ noted they were imported in large, irregular shipments which could cause large fluctuations in the data. Imports of passenger motor cars rose 23 per cent, while imports of machinery and plant increased 13 per cent.
"Robust imports are a sign of economic strength, as the booming NZ economy pulls in additional resources," ASB Bank senior economist Jane Turner said in a note. "Over the past year, Stats NZ noted that plant and machinery imports (which include items such as cranes and excavators) have increased 13 per cent. Meanwhile, population growth is fuelling demand for cars, with passenger motor car imports up 23 per cent over the past year.
"Strong imports, combined with continued growth in NZ's exports, highlight the robust footing of the NZ economy. Over the coming year, NZ's strong export prices relative to low import prices will provide an income boost to the economy and be a key driver of growth going forward."
New Zealand had a monthly trade surplus of $103m, or 2.1 per cent of exports. This is lower than the average surplus of 5.7 per cent of exports for the previous five May months, due to higher-than-average import values, Stats NZ said.
The annual trade deficit for the year ended May widened to $3.75b, from the $3.62b shortfall in the year ended April.