Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 810 | Kilograms | NA |
| 2003 | 820 | Kilograms | 1.23% |
| 2004 | 800 | Kilograms | -2.44% |
| 2005 | 550 | Kilograms | -31.25% |
| 2006 | 750 | Kilograms | 36.36% |
| 2007 | 600 | Kilograms | -20.00% |
| 2008 | 700 | Kilograms | 16.67% |
| 2009 | 600 | Kilograms | -14.29% |
