Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 573 | Thousand metric tons | NA |
2004 | 916.927978515625 | Thousand metric tons | 60.02 % |
2005 | 1031.61804199219 | Thousand metric tons | 12.51 % |
2006 | 854.046997070313 | Thousand metric tons | -17.21 % |
2007 | 866.932983398438 | Thousand metric tons | 1.51 % |
2008 | 1018.3330078125 | Thousand metric tons | 17.46 % |
2009 | 850 | Thousand metric tons | -16.53 % |