Gross domestic product is up slightly, buoyed by growth in the primary industries.

Milk production, oil exploration and gas extraction have all increased.

And that's pushed GDP up, with some of the strongest growth seen in 15 years.

Agriculture and mining are key drivers of the move, while the forestry and logging industry is down.

Manufacturing activity has also grown.

Overall GDP increased 2.9% in the year ending September.

That's put the size of the economy at $237b.