Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 15 | Metric tons | NA |
| 2004 | 15 | Metric tons | 0.00% |
| 2005 | 6 | Metric tons | -60.00% |
| 2006 | 8 | Metric tons | 33.33% |
| 2007 | 8 | Metric tons | 0.00% |
| 2008 | 21 | Metric tons | 162.50% |
| 2009 | 15 | Metric tons | -28.57% |
| 2010 | 15 | Metric tons | 0.00% |
