Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 300 | Thousand metric tons | NA |
2003 | 255 | Thousand metric tons | -15.00% |
2004 | 439.700012207031 | Thousand metric tons | 72.43% |
2005 | 641 | Thousand metric tons | 45.78% |
2006 | 837 | Thousand metric tons | 30.58% |
2007 | 800 | Thousand metric tons | -4.42% |
2008 | 750 | Thousand metric tons | -6.25% |
2009 | 700 | Thousand metric tons | -6.67% |
2010 | 930 | Thousand metric tons | 32.86% |
2011 | 1070 | Thousand metric tons | 15.05% |
2012 | 1230 | Thousand metric tons | 14.95% |