The country's exports have fallen in value for a second consecutive quarter.
The merchandise terms of trade was down 2% heading into the start of the year.
It fell by almost double that amount in the previous quarter.
Export prices dropped more than imports, meaning the country had less buying power.
Dairy and meat products led the downturn.
But overall the country made $2.5b more from outgoing goods than what was spent on imports in 2015.