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 | 439 | Metric tons | 778.00 % |
| 2005 | 23 | Metric tons | -94.76 % |
| 2006 | 1072 | Metric tons | 4,560.87 % |
| 2007 | 55 | Metric tons | -94.87 % |
| 2008 | 60 | Metric tons | 9.09 % |
| 2009 | 60 | Metric tons | 0.00 % |
