 
 <prompt> Wia di highest quantity of uranium dey exist? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: E dey estimated say 5.5 million tonnes of uranium dey for ore reserves wey dey economically viable at US$59 per lb of uranium, while 35 million tonnes dey classified as mineral resources (reasonable prospects for eventual economic extraction). Prices go from about $10/lb for May 2003 reach $138/lb for July 2007. Dis one don cause big increase for spending on exploration, with US$200 million wey dem spend worldwide for 2005, na 54% increase on top the previous year. Dis trend continue for 2006, when dem spend over $774 million on exploration, na increase of over 250% compared to 2004. The OECD Nuclear Energy Agency talk say exploration figures for 2007 fit match those for 2006. 