Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 50 | Metric tons | NA |
| 2003 | 50 | Metric tons | 0.00 % |
| 2004 | 50 | Metric tons | 0.00 % |
| 2005 | 50 | Metric tons | 0.00 % |
| 2006 | 55 | Metric tons | 10.00 % |
| 2007 | 55 | Metric tons | 0.00 % |
| 2008 | 70 | Metric tons | 27.27 % |
| 2009 | 65 | Metric tons | -7.14 % |
