Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 400 | Thousand metric tons | NA |
2004 | 400 | Thousand metric tons | 0.00% |
2005 | 400 | Thousand metric tons | 0.00% |
2006 | 400 | Thousand metric tons | 0.00% |
2007 | 400 | Thousand metric tons | 0.00% |
2008 | 400 | Thousand metric tons | 0.00% |
2009 | 400 | Thousand metric tons | 0.00% |