Renewable energy accounted for 6.6% of total production in the Netherlands in 2017, up from 5.9% the previous year, the national statistics office CBS reported on Wednesday.

Solar power accounted for more than 30% of the total. But biomass, which is also used in fuel for trucks and in electricity plants, accounts for 61% of renewable energy.

Renewable fuels produced 138 petajoules (PJ) of power last year, a 10% increase over 2016, the CBS added. Total Dutch energy consumption  remained unchanged at 2,100 PJ.

The Dutch target is to  produce 14% of energy using renewable sources by 2020, rising to 16% in 2023.

Of total energy production from renewable sources, roughly 50% was used for heat, 40% for electricity and 10% for fuel, the CBS said.

In January it emerged that the Netherlands is the worst performer in Europe in terms of meeting key United Nations targets on renewable energy and greenhouse gas emissions.