Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2005 | 2324 | Kilograms | NA |
| 2006 | 1129 | Kilograms | -51.42% |
| 2007 | 1861 | Kilograms | 64.84% |
| 2008 | 1665 | Kilograms | -10.53% |
| 2009 | 1117 | Kilograms | -32.91% |
| 2011 | 153 | Kilograms | -86.30% |
| 2012 | 100 | Kilograms | -34.64% |
