Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2002 | 209 | Kilograms | NA |
| 2003 | 770 | Kilograms | 268.42% |
| 2004 | 1125 | Kilograms | 46.10% |
| 2005 | 1397 | Kilograms | 24.18% |
| 2006 | 1571 | Kilograms | 12.46% |
| 2007 | 2250 | Kilograms | 43.22% |
| 2008 | 6033 | Kilograms | 168.13% |
| 2009 | 11581 | Kilograms | 91.96% |
| 2010 | 22939 | Kilograms | 98.07% |
| 2011 | 31774 | Kilograms | 38.52% |
| 2012 | 27850 | Kilograms | -12.35% |
