Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 3200 | Kilograms | NA |
| 2003 | 1800 | Kilograms | -43.75% |
| 2004 | 2100 | Kilograms | 16.67% |
| 2005 | 1300 | Kilograms | -38.10% |
| 2006 | 1300 | Kilograms | 0.00% |
| 2007 | 1300 | Kilograms | 0.00% |
| 2008 | 1359 | Kilograms | 4.54% |
| 2009 | 944 | Kilograms | -30.54% |
| 2010 | 974 | Kilograms | 3.18% |
| 2011 | 1266 | Kilograms | 29.98% |
| 2012 | 1300 | Kilograms | 2.69% |
