Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2002 | 30000 | Metric tons, gross weight | NA |
2003 | 30000 | Metric tons, gross weight | 0.00% |
2004 | 30000 | Metric tons, gross weight | 0.00% |
2005 | 30000 | Metric tons, gross weight | 0.00% |
2006 | 30000 | Metric tons, gross weight | 0.00% |