Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2003 | 500 | Metric tons | NA |
| 2004 | 500 | Metric tons | 0.00% |
| 2005 | 500 | Metric tons | 0.00% |
| 2006 | 500 | Metric tons | 0.00% |
| 2007 | 500 | Metric tons | 0.00% |
| 2008 | 1556 | Metric tons | 211.20% |
| 2009 | 1100 | Metric tons | -29.31% |
| 2010 | 3600 | Metric tons | 227.27% |
| 2011 | 4000 | Metric tons | 11.11% |
| 2012 | 4000 | Metric tons | 0.00% |
