An increasing amount of the cocoa processed by Dutch companies is sustainable, according to a report by the national statistics office CBS which was published on Thursday.

The percentage of sustainable cocoa used for processing in Dutch plants rose to 30% in 2016 from 21% in 2014.  Amsterdam is the largest cocoa importing port in the world, handling 20% of the annual harvest.

The beans are processed by several large companies in the Zaan region north of Amsterdam into semi-manufactures like cocoa mass, cocoa butter and cocoa powder. The largest part of this is exported to other European countries.

The remainder is sent to chocolate producers, bakeries and other foods companies in the Netherlands for further processing.

The CBS report said that 70% of processed cocoa was exported in 2016, while 25% was sold in Dutch supermarkets. A full 86% of the chocolate products sold in Dutch supermarkets in 2016 were sustainable, the report, commissioned by the agriculture ministry, said.