The headline rate of output inflation for goods leaving the factory gate was 2.5% on the year to December 2018, down from 3.0% in November 2018.
The growth rate of prices for materials and fuels used in the manufacturing process slowed to 3.7% on the year to December 2018, down from 5.3% in November 2018.
Petroleum products and crude oil provided the largest contribution to the change in the annual rate of output and input inflation respectively.
Crude oil increased 0.4% on the year to December 2018, down from 13.1% in November 2018.