Iran is being the top country by changes in inventories in the world. As of 2015, changes in inventories in Iran was 231,439,213 million volume, at constant 2005 prices - national currency that accounts for 61.88 % of the world's changes in inventories. The top 5 countries (others are Viet Nam, Indonesia, Republic of Korea, and Colombia) account for 96.41 % of it. The world's total changes in inventories was estimated at 374,013,664 million volume, at constant 2005 prices - national currency 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.