Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2004 | 500 | Metric tons | NA |
| 2005 | 500 | Metric tons | 0.00% |
| 2009 | 20000 | Metric tons | 3,900.00% |
| 2010 | 7000 | Metric tons | -65.00% |
