Like most commodities, the price of gold is driven by supply and demand, including speculative demand. However, unlike most other commodities, saving and disposal play larger roles in affecting its price than its consumption. Most of the gold ever mined still exists in accessible form, such as bullion and mass-produced jewelry, with little value over its fine weight — so it is nearly as liquid as bullion, and can come back onto the gold market. At the end of 2006, it was estimated that all the gold ever mined totalled .