Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 310 | Kilograms | NA |
| 2003 | 166 | Kilograms | -46.45 % |
| 2004 | 233 | Kilograms | 40.36 % |
| 2005 | 266 | Kilograms | 14.16 % |
| 2006 | 277 | Kilograms | 4.14 % |
| 2007 | 162 | Kilograms | -41.52 % |
| 2008 | 175 | Kilograms | 8.02 % |
| 2009 | 175 | Kilograms | 0.00 % |
