Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 17 | Kilograms | NA |
| 2003 | 63 | Kilograms | 270.59% |
| 2004 | 56 | Kilograms | -11.11% |
| 2005 | 63 | Kilograms | 12.50% |
| 2006 | 85 | Kilograms | 34.92% |
| 2007 | 97 | Kilograms | 14.12% |
| 2008 | 298 | Kilograms | 207.22% |
| 2009 | 511 | Kilograms | 71.48% |
| 2010 | 106 | Kilograms | -79.26% |
| 2011 | 111 | Kilograms | 4.72% |
| 2012 | 110 | Kilograms | -0.90% |
