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 | 524 | Kilograms | -16.03% |
| 2010 | 666 | Kilograms | 27.10% |
| 2011 | 448 | Kilograms | -32.73% |
| 2012 | 641 | Kilograms | 43.08% |
