Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 3570 | Kilograms | NA |
| 2003 | 1313 | Kilograms | -63.22 % |
| 2004 | 1219 | Kilograms | -7.16 % |
| 2005 | 1335 | Kilograms | 9.52 % |
| 2006 | 1324 | Kilograms | -0.82 % |
| 2007 | 1243 | Kilograms | -6.12 % |
| 2008 | 2836 | Kilograms | 128.16 % |
| 2009 | 6573 | Kilograms | 131.77 % |
