Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2006 | 322 | Kilograms | NA |
| 2007 | 2251 | Kilograms | 599.07% |
| 2008 | 6254 | Kilograms | 177.83% |
| 2009 | 8000 | Kilograms | 27.92% |
| 2010 | 8325 | Kilograms | 4.06% |
| 2011 | 8200 | Kilograms | -1.50% |
| 2012 | 7931 | Kilograms | -3.28% |
