Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 597 | Thousand metric tons | NA |
2003 | 700 | Thousand metric tons | 17.25% |
2004 | 754 | Thousand metric tons | 7.71% |
2005 | 1315 | Thousand metric tons | 74.40% |
2006 | 1373 | Thousand metric tons | 4.41% |
2007 | 1400 | Thousand metric tons | 1.97% |
2008 | 1780 | Thousand metric tons | 27.14% |
2009 | 1800 | Thousand metric tons | 1.12% |
2010 | 1500 | Thousand metric tons | -16.67% |
2011 | 1500 | Thousand metric tons | 0.00% |
2012 | 1600 | Thousand metric tons | 6.67% |