Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 188 | Kilograms | NA |
| 2003 | 4 | Kilograms | -97.87% |
| 2005 | 384 | Kilograms | 9,500.00% |
| 2006 | 186 | Kilograms | -51.56% |
| 2007 | 124 | Kilograms | -33.33% |
| 2008 | 46 | Kilograms | -62.90% |
| 2009 | 28 | Kilograms | -39.13% |
| 2010 | 12 | Kilograms | -57.14% |
| 2011 | 10 | Kilograms | -16.67% |
