Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 16 | Kilograms | NA |
| 2003 | 7 | Kilograms | -56.25% |
| 2004 | 7 | Kilograms | 0.00% |
| 2005 | 15 | Kilograms | 114.29% |
| 2006 | 10 | Kilograms | -33.33% |
| 2007 | 10 | Kilograms | 0.00% |
| 2008 | 43 | Kilograms | 330.00% |
| 2009 | 61 | Kilograms | 41.86% |
| 2010 | 59 | Kilograms | -3.28% |
| 2011 | 53 | Kilograms | -10.17% |
| 2012 | 55 | Kilograms | 3.77% |
