Belgium is being the top country by changes in inventories in the world. As of 2015, changes in inventories in Belgium was 149,822 million volume, at constant 2005 prices - US dollars that accounts for 37.86 % of the world's changes in inventories. The top 5 countries (others are China, the United States of America, India, and Iran) account for 100.61 % of it. The world's total changes in inventories was estimated at 395,748 million volume, at constant 2005 prices - US dollars in 2015.
Changes in inventories (including work-in-progress) consist of changes in: (a) stocks of outputs that are still held by the units that produced them prior to their being further processed, sold, delivered to other units or used in other ways; and (b) stocks of products acquired from other units that are intended to be used for intermediate consumption or for resale without further processing; they are measured by the value of the entries into inventories less the value of withdrawals and the value of any recurrent losses of goods held in inventories.