Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 28 | Kilograms | NA |
| 2003 | 30 | Kilograms | 7.14% |
| 2004 | 684 | Kilograms | 2,180.00% |
| 2005 | 4962 | Kilograms | 625.44% |
| 2006 | 2615 | Kilograms | -47.30% |
| 2007 | 3427 | Kilograms | 31.05% |
| 2008 | 2314 | Kilograms | -32.48% |
| 2009 | 1985 | Kilograms | -14.22% |
| 2010 | 1596 | Kilograms | -19.60% |
| 2011 | 1453 | Kilograms | -8.96% |
| 2012 | 1600 | Kilograms | 10.12% |
