Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
| Year | Production | Unit of Measure | % Change |
| 2005 | 440 | Kilograms | NA |
| 2006 | 956 | Kilograms | 117.27% |
| 2007 | 1270 | Kilograms | 32.85% |
| 2008 | 1930 | Kilograms | 51.97% |
| 2009 | 3100 | Kilograms | 60.62% |
| 2010 | 3400 | Kilograms | 9.68% |
| 2011 | 3500 | Kilograms | 2.94% |
| 2012 | 3600 | Kilograms | 2.86% |
