Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 210 | Kilograms | NA |
| 2003 | 203 | Kilograms | -3.33% |
| 2004 | 195 | Kilograms | -3.94% |
| 2005 | 200 | Kilograms | 2.56% |
| 2006 | 200 | Kilograms | 0.00% |
| 2007 | 252 | Kilograms | 26.00% |
| 2008 | 1000 | Kilograms | 296.83% |
| 2009 | 2000 | Kilograms | 100.00% |
| 2010 | 2000 | Kilograms | 0.00% |
| 2011 | 2000 | Kilograms | 0.00% |
| 2012 | 2000 | Kilograms | 0.00% |
