Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 50 | Metric tons | NA |
| 2004 | 40 | Metric tons | -20.00% |
| 2005 | 22 | Metric tons | -45.00% |
| 2006 | 25 | Metric tons | 13.64% |
| 2007 | 25 | Metric tons | 0.00% |
| 2008 | 25 | Metric tons | 0.00% |
