In March output was up 2.8% year-on-year, compared to annual growth of 5.8% in January and 4.3% in February. Compared to the month before, it declined by 0.6%.
Mining was the strongest performer, with output up almost a quarter over March 2018, while manufacturing grew by 3.5% and output in electricity and gas supply plunging by almost 7%.
Industrial revenue was 1% higher than a year ago, even though it was almost 2% lower than in February.
Inventories rose by 0.8% over February.