Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 77 | Kilograms | NA |
| 2003 | 79 | Kilograms | 2.60% |
| 2004 | 107 | Kilograms | 35.44% |
| 2005 | 109 | Kilograms | 1.87% |
| 2006 | 84 | Kilograms | -22.94% |
| 2007 | 92 | Kilograms | 9.52% |
| 2008 | 92 | Kilograms | 0.00% |
| 2009 | 346 | Kilograms | 276.09% |
| 2010 | 340 | Kilograms | -1.73% |
| 2011 | 300 | Kilograms | -11.76% |
| 2012 | 300 | Kilograms | 0.00% |
