Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 1500 | Thousand metric tons | NA |
2004 | 1500 | Thousand metric tons | 0.00 % |
2005 | 1500 | Thousand metric tons | 0.00 % |
2006 | 1200 | Thousand metric tons | -20.00 % |
2007 | 1000 | Thousand metric tons | -16.67 % |
2008 | 1000 | Thousand metric tons | 0.00 % |
2009 | 700 | Thousand metric tons | -30.00 % |
2010 | 483 | Thousand metric tons | -31.00 % |
2011 | 500 | Thousand metric tons | 3.52 % |
2012 | 450 | Thousand metric tons | -10.00 % |