Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 3 | Metric tons | NA |
| 2003 | 3 | Metric tons | 0.00% |
| 2004 | 3 | Metric tons | 0.00% |
| 2005 | 2000 | Metric tons | 66,566.67% |
| 2006 | 2200 | Metric tons | 10.00% |
| 2007 | 2500 | Metric tons | 13.64% |
| 2008 | 2000 | Metric tons | -20.00% |
| 2009 | 2000 | Metric tons | 0.00% |
| 2010 | 2000 | Metric tons | 0.00% |
| 2011 | 2000 | Metric tons | 0.00% |
| 2012 | 2000 | Metric tons | 0.00% |
