By destination, shipments to China, the United States and the European Union decreased by 6.8%, 2.1% and 5.3%, respectively.
Semiconductor exports rose 1.9% and petroleum products jumped 88.3%, but cars, auto parts and wireless devices fell 23.5%, 14.7 % and 23.5%, respectively.
On average per working day, exports still increased by 11.0%, as there were two fewer working days compared to the same period the previous year.
Data for the full month will be available on July 1.