Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 300 | Kilograms | NA |
| 2003 | 300 | Kilograms | 0.00% |
| 2004 | 8513 | Kilograms | 2,737.67% |
| 2005 | 10619 | Kilograms | 24.74% |
| 2006 | 9362 | Kilograms | -11.84% |
| 2007 | 9360 | Kilograms | -0.02% |
| 2008 | 9798 | Kilograms | 4.68% |
| 2009 | 12193 | Kilograms | 24.44% |
| 2010 | 10886 | Kilograms | -10.72% |
| 2011 | 11975 | Kilograms | 10.00% |
| 2012 | 11882 | Kilograms | -0.78% |
