 Doubling the price of uranium would increase the identified reserves as of 2013 to 7.64 million tons.Over the decade 2003–2013, the identified reserves of uranium (at the same price of US$130/kg) rose from 4.59 million tons in 2003 to 5.90 million tons in 2013, an increase of 28%.The United States has the 4th largest uranium reserves in the world.