Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 1729 | Metric tons | NA |
2004 | 1829 | Metric tons | 5.78% |
2005 | 1664 | Metric tons | -9.02% |
2006 | 1595 | Metric tons | -4.15% |
2007 | 1600 | Metric tons | 0.31% |