Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 42 | Kilograms | NA |
| 2003 | 20 | Kilograms | -52.38 % |
| 2004 | 110 | Kilograms | 450.00 % |
| 2005 | 27 | Kilograms | -75.45 % |
| 2006 | 9 | Kilograms | -66.67 % |
| 2007 | 311 | Kilograms | 3,355.56 % |
| 2008 | 624 | Kilograms | 100.64 % |
| 2009 | 600 | Kilograms | -3.85 % |
