Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 205 | Thousand metric tons | NA |
2003 | 272 | Thousand metric tons | 32.68% |
2004 | 307.100006103516 | Thousand metric tons | 12.90% |
2005 | 331.200012207031 | Thousand metric tons | 7.85% |
2006 | 202.199996948242 | Thousand metric tons | -38.95% |
2007 | 326.200012207031 | Thousand metric tons | 61.33% |
2008 | 247 | Thousand metric tons | -24.28% |
2009 | 622 | Thousand metric tons | 151.82% |
2010 | 1930 | Thousand metric tons | 210.29% |
2011 | 3002 | Thousand metric tons | 55.54% |
2012 | 3477 | Thousand metric tons | 15.82% |